Research Frontiers Incorporated

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 26179
 
  
 
G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS 10123
 
  
 
F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR 5105
 
  
 
C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR491
 
  
 
C08K USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS 2100
 
  
 
E06B FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES 243
 
  
 
A47F SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS, OR THE LIKE; PAYING COUNTERS131
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1124
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
B44D PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES 15

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2017/0322,346 LIGHT VALVE FILMS LAMINATED BETWEEN THIN GLASS AND PLASTIC SUBSTRATESApr 27, 17Nov 09, 17[G02B, G02F, B32B]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9417471 Method and device for protecting objects from degradation by light with suspended particle device light valvesApr 29, 14Aug 16, 16[G02B, G02F, A47F, B44D]
8922872 SPD films with darker off-state transmittances and lighter on-state transmittancesFeb 07, 13Dec 30, 14[G02B, G02F]
8670173 SPD films and light valve laminates with improved durabilityJul 13, 11Mar 11, 14[G09G, G02B]
8174753 Methods and circuits for distributing power to SPD loadsMar 10, 08May 08, 12[G09G, G02B]
7920321 SPD films and light valves incorporating overcoatings which enhance film adhesion to substrates, have good cohesion and protect against electrical short circuitsDec 01, 08Apr 05, 11[G02B]
7847033 Materials and methods for improving properties of SPD emulsions and filmsJun 20, 06Dec 07, 10[C09K, C08F]
7791788 SPD light valves incorporating films comprising improved matrix polymers and methods for making such matrix polymersNov 14, 06Sep 07, 10[C08J, G09G, G02B]
7417785 Methods and circuits for distributing power to SPD loadsJan 18, 05Aug 26, 08[G02B]
7361252 Methods for laminating films for SPD light valves and SPD light valves incorporating such laminated filmsJul 23, 04Apr 22, 08[B29C]
6987602 Anisometrically shaped carbon and/or graphite particles, liquid suspensions and films thereof and light valves comprising sameDec 27, 02Jan 17, 06[G02B]

View all patents..

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0236,393 SPD FILMS FORMED WITH CONDUCTIVE POLYMER-COATED SUBSTRATESAbandonedMay 04, 12Sep 20, 12[B05D, G02F, B32B]
2011/0100,709 SPD FILMS AND LIGHT VALVE LAMINATES WITH IMPROVED BUS-BAR CONNECTIONSAbandonedOct 29, 10May 05, 11[H01R]
2011/0030,290 ENERGY EFFICIENT FENESTRATION PRODUCT WITH SUSPENDED PARTICLE DEVICEAbandonedAug 05, 10Feb 10, 11[E06B, E04C, B32B]
6517746 Polyhalide particles and light valves comprising sameExpiredJan 05, 01Feb 11, 03[F21V, G02B, G02F]
6156239 Light polarizing materials, liquid suspensions and films thereof, and light valves incorporating sameExpiredFeb 26, 99Dec 05, 00[F21V, G02B, C02F]
5838482 Optical cellExpiredNov 06, 96Nov 17, 98[G02F]
5764402 Optical cell control systemExpiredOct 28, 96Jun 09, 98[H01L, G02F]
5650872 Light valve containing ultrafine particlesExpiredJan 13, 95Jul 22, 97[G02B]
5130057 Light polarizing materials and suspensions thereofExpiredNov 02, 90Jul 14, 92[F21V, G02B]
5111331 Electro-optical light modulatorExpiredJul 05, 89May 05, 92[G02B, G02F]
5093041 Light-polarizing material based on ethylenediamine polyacetic acid derivativesExpiredJul 30, 90Mar 03, 92[F21V, G02B, G02F]
5002701 Light polarizing materials and suspensions thereofExpiredOct 27, 89Mar 26, 91[G02B]
4877313 Light-polarizing materials and suspensions thereofExpiredFeb 10, 89Oct 31, 89[F21V, G02B]
4772103 Light valve containing an improved suspension, and liquids thereforExpiredAug 08, 86Sep 20, 88[G02B]
4422963 Light valve polarizing materials and suspensions thereofExpiredNov 15, 78Dec 27, 83[G02F]
4407565 Light valve suspension containing fluorocarbon liquidExpiredJan 16, 81Oct 04, 83[G02F]
4273422 Light valve containing liquid suspension including polymer stabilizing systemExpiredMar 05, 79Jun 16, 81[G02F]
4270841 Light valve containing suspension of perhalide of alkaloid acid saltExpiredOct 31, 78Jun 02, 81[G02F]
4247175 Light valve containing improved light valve suspensionExpiredOct 31, 78Jan 27, 81[G02F]

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