Note1. Basis of Presentation

Theaccompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accountingprinciples (“GAAP”) for interim financial information and with the instructions to Rule 8-03 of Regulation S-X. Accordingly,they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management,all adjustments considered necessary for a fair presentation have been included. All such adjustments are of a normal recurring nature.Operating results for the three and six months ended June 30, 2025 are not necessarily indicative of the results that may be expectedfor the fiscal year ending December 31, 2025. The condensed consolidated balance sheet as of December 31, 2024 has been derived fromthe audited consolidated financial statements as of that date. For further information, refer to the consolidated financial statementsand footnotes thereto included in the Annual Report on Form 10-K relating to Research Frontiers Incorporated for the fiscal year endedDecember 31, 2024.

Note2. Business

ResearchFrontiers Incorporated (“Research Frontiers” or the “Company”) operates in a single business segment which isengaged in the development and marketing of technology and devices to control the flow of light. Such devices, often referred to as “lightvalves” or suspended particle devices (“SPDs”), use colloidal particles that are either incorporated within a liquidsuspension or a film, which is usually enclosed between two sheets of glass or plastic having transparent, electrically conductive coatingson the facing surfaces thereof. At least one of the two sheets is transparent. SPD technology, made possible by a flexible light-controlfilm invented by Research Frontiers, allows the user to instantly and precisely control the shading of glass/plastic manually or automatically.SPD technology has numerous product applications, including SPD-Smart™ windows, sunshades, skylights and interior partitions forhomes and buildings; automotive windows, sunroofs, sun visors, sunshades, rear-view mirrors, instrument panels and navigation systems;aircraft windows; museum display panels; eyewear products; and flat panel displays for electronic products. SPD-Smart light control filmis now being developed for, or used in, architectural, automotive, marine, aerospace and appliance applications.

TheCompany has primarily utilized its cash, cash equivalents, and investments generated from sales of our common stock, proceeds from theexercise of options and warrants, and royalty fees collected to fund its research and development of SPD light valves, for marketinginitiatives, and for other working capital purposes. The Company’s working capital and capital requirements depend upon numerousfactors, including the results of research and development activities, competitive and technological developments, the timing and costof patent filings, and the development of new licensees and changes in the Company’s relationships with its existing licensees.The degree of dependence of the Company’s working capital requirements on each of the foregoing factors cannot be quantified; increasedresearch and development activities and related costs would increase such requirements; the addition of new licensees may provide additionalworking capital or working capital requirements; and changes in relationships with existing licensees would have a favorable or negativeimpact depending upon the nature of such changes. We have incurred recurring losses since inception and expect to continue to incur lossesas a result of costs and expenses related to our research and continued development of our SPD technology and our corporate general andadministrative expenses. Our capital requirements and operations to date have been substantially funded through sales of our common stock,exercise of options and warrants and royalty fees collected. As of June 30, 2025, we had working capital of approximately $1.7 million,cash and cash equivalents of approximately $1.3 million, shareholders’ equity of approximately $1.8 million and an accumulateddeficit of approximately $126.6 million. Based on current operations, we expect to have sufficient working capital for at least 12 monthsfrom the issuance of these financial statements.

Inthe event that we are unable to generate sufficient cash from our operating activities or raise additional funds, we may be requiredto delay, reduce or severely curtail our operations or otherwise impede our on-going business efforts, which could have a material adverseeffect on our business, operating results, financial condition and long-term prospects. The Company may seek to obtain additional fundingthrough future equity issuances. There can be no assurance as to the availability or terms upon which such financing and capital mightbe available. The eventual success of the Company and generation of positive cash flow will be dependent upon the commercialization ofproducts using the Company’s technology by the Company’s licensees and payments of continuing royalties on account thereof.

Note3. Segment Information

TheCompany operates as a single operating segment which is engaged in the development and marketing of technology and devices tocontrol the flow of light (as described in Note 2). The Company develops and licenses our patented suspended particle device(“SPD-Smart”) light-control technology to other companies that manufacture and/or market the: (i) SPD-Smart chemicalemulsion, (ii) light-control film made from the chemical emulsion, (iii) the light-control panels made by laminating the film, (iv)electronics to power end-products incorporating the film, or (v) lamination services for and the end-products themselves such as“smart” windows, skylights and sunroofs. The Company currently has over 40 licensees that, in the aggregate, arelicensed to primarily serve five major SPD-Smart application areas (aerospace, architectural, automotive, marine and displayproducts) in every country of the world. The Company derives revenue from licensees in North America, Europe and Asia. TheCompany’s Chief Operating Decision Maker (“CODM”) reviews revenue and consolidated net operating loss as a totaland not by industry of licensees, and the royalty rates that we charge our licensees are consistent when measuring theCompany’s profitability and allocating resources across geographical location and by industry. The Company does not haveintra-entity sales or transfers. The Company’s long-lived assets consist of property and equipment and operating leaseright-of-use assets (“ROU”), all of which are located in the United States. During the six month periods ended June 30,2025 and 2024, 99%and 61%, respectively, of the Company’s revenue was generated from sources outside of the United States.

TheCODM is the Company’s Chief Executive Officer and acting Chief Financial Officer. The CODM assesses performance for the singleoperating segment and decides how to allocate resources based on consolidated net operating loss that is also reported on the Company’scondensed consolidated statements of operations.

Consolidatednet operating loss is used by the Company’s CODM to monitor budget versus actual results; conducting this monitoring on at leasta quarterly basis as a part of the Company’s quarterly 10-Q and annual 10-K filing processes. Included in the review process isa detailed review and discussion related to the Company’s Management’s Discussion and Analysis. In addition, meetings ofthe Company’s Audit Committee are also held at least quarterly and those meetings include a review of consolidated operating results.

Thefollowing table illustrates the information about the Company’s single reportable segment, which the Company’s CODM regularlyevaluates in addition to the information already presented on the Company’s condensed consolidated statements of operations andidentifies expense items exceeding the Company’s significant expense thresholds described above:

Note4. Patent Costs

TheCompany expenses costs relating to the development, acquisition or enforcement of patents due to the uncertainty of the recoverabilityof these items.

Note5. Revenue Recognition

TheCompany recognizes revenue in accordance with Accounting Standards Codification (“ASC”) 606, Revenue from Contracts withCustomers (Topic 606). The standard provides a single comprehensive revenue recognition model for all contracts with customers andsupersedes existing revenue recognition guidance. The revenue standard contains principles that an entity will apply to determine themeasurement of revenue and timing of when it is recognized. The underlying principle is that an entity will recognize revenue to depictthe transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods orservices.

ASC606 follows a five-step approach to determining revenue recognition including: 1) Identification of the contract; 2) Identification ofthe performance obligations; 3) Determination of the transaction price; 4) Allocation of the transaction price; and 5) Recognition ofrevenue.

TheCompany determined that its license agreements provide for three performance obligations which include: (i) the Grant of Use to its PatentPortfolio (“Grant of Use”), (ii) Stand-Ready Technical Support (“Technical Support”) including the transfer oftrade secrets and other know-how, production of materials, scale-up support, analytical testing, etc., and (iii) access to new IntellectualProperty (“IP”) that may be developed sometime during the course of the contract period (“New Improvements”).Given the nature of IP development, such New Improvements are on an unspecified basis and can occur and be made available to licenseesat any time during the contract period.

Whena contract includes more than one performance obligation, the Company needs to allocate the total consideration to each performance obligationbased on its relative standalone selling price or estimate the standalone selling price if it is not observable. A standalone sellingprice is not available for our performance obligations since we do not sell any of the services separately and there is no competitorpricing that is available. As a consequence, the best method for determining the standalone selling price of our Grant of Use performanceobligation is through a comparison of the average royalty rate for comparable license agreements as compared to our license agreements.Comparable license agreements must consider several factors including: (i) the materials that are being licensed, (ii) the market applicationfor the licensed materials, and (iii) the financial terms in the license agreements that can increase or decrease the risk/reward natureof the agreement.

Basedon the royalty rate comparison referred to above, any pricing above and beyond the average royalty rate would relate to the TechnicalSupport and New Improvements performance obligations. The Company focuses a significant portion of its time and resources to providethe Technical Support and New Improvements services to its licensees which further supports the conclusions reached using the royaltyrate analysis.

TheTechnical Support and New Improvements performance obligations are co-terminus over the term of the license agreement. For purposes ofdetermining the transaction price, and recognizing revenue, the Company combined the Technical Support and New Improvements performanceobligations because they have the same pattern of transfer and the same term. We maintain a staff of scientists and other professionalswhose primary job responsibilities throughout the year are: (i) being available to respond to Technical Support needs of our licensees,and (ii) developing improvements to our technology which are offered to our licensees as New Improvements. Since the costs incurred tosatisfy the Technical Support and New Improvements performance obligations are incurred evenly throughout the year, the value of theTechnical Support and New Improvements services are recognized throughout the initial contract period as these performance obligationsare satisfied. If the agreement is not terminated at the end of the initial contract period, it will automatically renew on the sameterms as the initial contract for a one-year period. Consequently, any fees or minimum annual royalty obligations relating to this renewalcontract will be allocated similarly to the initial contract over the additional one-year period.

Werecognize revenue when or as the performance obligations in the contract are satisfied. For performance obligations that are fulfilledat a point in time, revenue is recognized at the fulfillment of the performance obligation. Since the IP is determined to be a functionallicense, the value of the Grant of Use is recognized in the first period of the contract term in which the license agreement is in force.The value of the Technical Support and New Improvements obligations is allocated throughout the contract period based on the satisfactionof its performance obligations. If the agreement is not terminated at the end of the contract period, it will renew on the same termsas the original agreement for a one-year period. Consequently, any fees or minimum annual royalties (“MAR”) relating to thisrenewal contract will be allocated similarly over that additional year.

TheCompany’s license agreements have a variable royalty fee structure (meaning that royalties are a fixed percentage of sales thatvary from period to period) and frequently include a minimum annual royalty commitment. In instances when sales of licensed productsby its licensees exceed the MAR, the Company recognizes fee income as the amounts have been earned. Typically, the royalty rate for suchsales is 10-15% of the selling price. While this is variable consideration, it is subject to the sales/usage royalty exception to recognitionof variable consideration in ASC 606 10-55-65 and therefore is not recognized until the subsequent sales or usage occurs or the MAR periodcommences.

Becauseof the immediate recognition of the Grant of Use performance obligation: (i) the first period of the contract term will generally havea higher percent allocation of the transaction price under ASC 606, and (ii) the remaining periods in the year will have less of thetransaction price recognized under ASC 606. After the initial period in the contract term, the revenue for the remaining periods willbe based on the satisfaction of the Technical Support and New Improvements obligations.

Asof June 30, 2025, the Company had $51,000 in unbilled revenue included in royalty receivables.

Certainof the contract fees are accrued by, or paid to, the Company in advance of the period in which they are earned resulting in deferredrevenue (contract liabilities). Such excess amounts are recorded as deferred revenue and are recognized as revenue in future periodsas earned. Contract assets represent unbilled receivables and are presented within accounts receivable, net on the condensed consolidatedbalance sheets.

TheCompany operates in a single business segment which is engaged in the development and marketing of technology and devices to controlthe flow of light. Our revenue source comes from the licensing of this technology and all of these license agreements have similar termsand provisions. The majority of the Company’s licensing fee income comes from the activities of several licensees participatingin the automotive market. The Company currently believes that the automotive market will be the largest source of its royalty incomeover the next several years. The Company’s royalty income from this market may be influenced by numerous factors including varioustrends affecting demand in the automotive industry and the rate of introduction of new technology in OEM product lines. In addition tothese macro factors, the Company’s royalty income from the automotive market could also be influenced by specific factors suchas whether the Company’s SPD-SmartGlass technology appears as standard equipment or as an option on a particular vehicle, the numberof additional vehicle models that SPD-SmartGlass appears on, the size of each window on a vehicle and the number of windows on a vehiclethat use SPD-SmartGlass, fluctuations in the total number of vehicles produced by a manufacturer, and in the percentage of cars withineach model produced with SPD-SmartGlass, and changes in pricing or exchange rates.

Note6. Fee Income

Feeincome represents amounts earned by the Company under various license and other agreements relating to technology developed by the Company.

Duringthe first six months of 2025, four licensees accounted for 10% or more of fee income of the Company; these licensees accounted for approximately35%, 33%, 13% and 13% of fee income recognized during such period. During the first six months of 2024, four licensees accounted for10% or more of fee income of the Company; these licensees accounted for approximately 31%, 30%, 11% and 11% of fee income recognizedduring such period.

Duringthe three months June 30, 2025, three licensees accounted for 10% or more of fee income of the Company; these licensees accountedfor approximately 40%, 23%and 23%of fee income recognized during such period. During the three months ended June 30, 2024, two licensees accounted for 10% or more offee income of the Company; these licensees accounted for approximately 51%and 24%of fee income recognized during such period.

Subsequent to June 30, 2025, the Company was notifiedthat one of its significant European licensees filed for bankruptcy. This licensee accounted for approximately 33% and 0% of the Company’srevenue during the six and three months ended June 30, 2025, respectively. No revenue was recognized from this licensee during the periodsended June 30, 2024. There is no outstanding accounts receivable from this licensee as of June 30, 2025.

Note7. Income Taxes

Sinceinception, the Company has incurred losses from operations and as a result has not recorded income tax expense. Benefits related to netoperating loss carryforwards and other deferred tax items have been fully reserved since it was more likely than not that the Companywould not achieve profitable operations and be able to utilize the benefit of the net operating loss carryforwards.

Note8. Basic and Diluted Loss Per Common Share

Basicnet loss per share excludes any dilution. It is based upon the weighted average number of common shares outstanding during the period.Dilutive net loss per share reflects the potential dilution that would occur if securities or other contracts to issue common stock wereexercised or converted into common stock. The Company’s dilutive loss per share equals basic loss per share for the periods endedJune 30, 2025 and 2024, respectively, because all common stock equivalents (i.e., options and warrants) were antidilutive in thoseperiods. The number of options and warrants that were not included (because their effect is antidilutive) were 2,911,923 and 2,706,872for the periods ended June 30, 2025 and 2024, respectively.

Note9. Equity

Duringthe six months ended June 30, 2024, the Company received proceeds of $8,670 in connection with the exercise of options covering 8,500shares of common stock. No options or warrants were exercised during the six month period ended June 30, 2025.

OnSeptember 16, 2022, the Company entered into subscription agreements from a group of private accredited investors to sell them 2.0 millionshares of common stock of the Company at a price of $2.30 per share (which represented the closing market price of the Company’scommon stock on September 14, 2022 which was the date that the transaction was agreed to). As of December 31, 2022, the Company received$3,450,000 under these subscription agreements and issued 1,500,000 common shares and issued 1,500,000 warrants. During 2024, the Companyreceived $300,000 and issued 130,434 shares and 130,434 warrants in connection with a remaining outstanding commitment under these subscriptionagreements. The Company has an outstanding commitmentfrom a potential investor for the remaining $850,000 under these subscription agreements. The Company did not sell any equity securitiesduring the six month-periods ended June 30, 2025 and 2024.

Theshares were issued to the investors in a private placement and, along with the shares issued in connection with the exercise of any warrantsin the future, are not registered and therefore currently subject to at least a six-month holding period by the investor.

InDecember 2024, the Board of Directors approved 138,501 stock options under the Company’s 2019 Equity Incentive Plan which weregranted upon shareholder approval at the annual meeting of shareholders held in June 2025. These options became fully vested upon grantand the Company recorded share-based compensation of $175,204 during the six months ended June 30, 2025. No options were granted duringthe six months ended June 30, 2024.

Asof June 30, 2025, there were 1,630,434 warrants and 1,281,489 options outstanding.

Note10. Leases

TheCompany determines if an arrangement is a lease at its inception. This determination generally depends on whether the arrangement conveysthe right to control the use of an identified fixed asset explicitly or implicitly for a period of time in exchange for consideration.Control of an underlying asset is conveyed if the Company obtains the rights to direct the use of, and to obtain substantially all ofthe economic benefits from the use of, the underlying asset. Lease expense for variable leases and short-term leases is recognized whenthe obligation is incurred.

TheCompany has an operating lease for its facility, which was amended and extended in 2024, with a remaining lease term of 6.5 years (includingrenewal options) as of June 30, 2025. As of June 30, 2024, the weighted average remaining lease term was 0.7 years. The initial termof the lease expires on December 31, 2027 with renewal options that potentially extend expiration through December 31, 2031. Operatingleases are included in Operating lease ROU assets, other current liabilities and long-term lease liabilities on the condensed consolidatedbalance sheets. Operating lease ROU assets and operating lease liabilities are recognized at each lease’s commencement date basedon the present value of its lease payments over its respective lease term. The Company does not have an established incremental borrowingrate as it does not have any debt. The Company uses the stated borrowing rate for a lease when readily determinable. When the interestrate implicit in its lease agreements is not readily determinable, the Company uses an interest rate based on the marketplace for publicdebt. The incremental borrowing rate associated with the operating lease as of June 30, 2025 and 2024 is 7.0% and 5.5%, respectively.Cash rent paid for the six months ended June 30, 2025 and 2024 was $111,000 and $115,000, respectively.

Note11. Related Party

EffectiveJune 4, 2023, the Chairman and CEO of Gauzy, Ltd., one of the Company’s licensees, joined the Board of the Company. Gauzy’slicense agreement has been in effect since September 17, 2017 and provides for minimum annual royalties and earned royalties relatingto sales of SPD-SmartGlass architectural window products. Because the Company collects a 10-15% royalty from the higher-priced end productsales by Gauzy’s customers purchasing their SPD-Smart light control film, under its license agreement with Gauzy, the Company doesnot collect a royalty on sales by Gauzy of SPD-Smart light control film to these licensee customers. In addition, the Company’slicensee Vision Systems, Inc. is a 100% owned subsidiary of Gauzy, Ltd. For the six-month periods ended June 30, 2025 and 2024, fee incomerelated to Gauzy and Vision Systems represented 14% and 13%, respectively, of the Company’s total fee income. For the three-monthperiods ended June 30, 2025 and 2024, fee income related to Gauzy and Vision Systems represented 27% and 7%, respectively, of the Company’stotal fee income. In addition, as of June 30, 2025 and 2024, the Company’s accounts receivable from Gauzy and Vision Systems represented14% and 8%, respectively, of the Company’s total royalty receivables, before reserves.

Note12. Other Income

Duringthe six months ended June 30, 2025, the Company received $47,357 in Employee Retention Credits, a refundable tax credit available underthe Coronavirus Aid, Relief, and Economic Securities Act (“CARES Act”) that was designed to keep employees on the payrollduring the COVID-19 pandemic. There were no such credits received during the six months ended June 30, 2024.