Eastman Kodak Co
Eastman KoActive Patents
0
Total Holdings
299
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| EP0552802A2 | Chemically fixed micelles comprising copolymer | Expired / Lapsed | 1993-01-22 | — | 12 | Details |
| EP0467459A2 | Near infrared diagnostic method and instrument | Expired / Lapsed | 1991-07-11 | — | 19 | Details |
| EP0291170A1 | Rearwardly acting surgical catheter | Expired / Lapsed | 1988-04-13 | — | 8 | Details |
| WO1985004412A1 | Novel polyesteramides and containers having improved gas ba… | Expired / Lapsed | 1985-03-15 | — | 0 | Details |
| EP0140337A2 | Multizone element and method for analysis of whole blood | Expired / Lapsed | 1984-10-25 | — | 11 | Details |
| WO1984000282A1 | Rumen-stable pellets | Expired / Lapsed | 1983-07-06 | — | 0 | Details |
| GB1196771A | Range Finders. | Expired / Lapsed | 1967-05-25 | — | 0 | Details |
| US5530502A | Camera autowind gear mechanism | Expired / Lapsed | 1995-03-13 | 1996-06-25 | 35 | Details |
| US5252441A | Transparent magnetic recording layers and photographic elem… | Expired / Lapsed | 1990-11-06 | 1993-10-12 | 27 | Details |
| US5135405A | Connectors with ground structure | Expired / Lapsed | 1991-09-27 | 1992-08-04 | 10 | Details |
| US5053096A | Apparatus and method for splicing webs of indeterminate len… | Expired / Lapsed | 1990-01-26 | 1991-10-01 | 14 | Details |
| US4847175A | Electrophotographic element having low surface adhesion | Expired / Lapsed | 1987-12-02 | 1989-07-11 | 15 | Details |
| US4846192A | Rearwardly acting surgical catheter | Expired / Lapsed | 1987-04-17 | 1989-07-11 | 2 | Details |
| US4824939A | Process for leaching particulate solid materials | Expired / Lapsed | 1986-10-09 | 1989-04-25 | 35 | Details |
| US4784928A | Reusable electrophotographic element | Expired / Lapsed | 1986-09-02 | 1988-11-15 | 8 | Details |
| US4777510A | Copying apparatus and method with editing and production co… | Expired / Lapsed | 1987-12-09 | 1988-10-11 | 57 | Details |
| US4588896A | Bistable circuits having a monolithic device formed with li… | Expired / Lapsed | 1983-11-18 | 1986-05-13 | 4 | Details |
| US4553027A | Apparatus for reading encoded information on a carrier subj… | Expired / Lapsed | 1984-10-03 | 1985-11-12 | 7 | Details |
| US4527891A | Rangefinder device with serial readout linear image sensor … | Expired / Lapsed | 1982-08-18 | 1985-07-09 | 10 | Details |
| US4490036A | Image sensor and rangefinder device having background subtr… | Expired / Lapsed | 1982-08-18 | 1984-12-25 | 7 | Details |
| US4490037A | Image sensor and rangefinder device having background subtr… | Expired / Lapsed | 1982-08-18 | 1984-12-25 | 9 | Details |
| US4451137A | Adjusting copier copy contrast and density during productio… | Expired / Lapsed | 1982-05-27 | 1984-05-29 | 14 | Details |
| US4410251A | Integrated electromechanical camera control mechanism | Expired / Lapsed | 1982-03-22 | 1983-10-18 | 26 | Details |
| US4251154A | Electrophotographic color copier | Expired / Lapsed | 1979-04-09 | 1981-02-17 | 9 | Details |
| US4191465A | Apparatus for producing simplex of duplex copies | Expired / Lapsed | 1978-07-03 | 1980-03-04 | 20 | Details |
| US4163823A | Magnetic recording elements and process of preparation | Expired / Lapsed | 1977-03-07 | 1979-08-07 | 26 | Details |
| US4152152A | Additives for contrast control in organic photoconductor co… | Expired / Lapsed | 1977-02-08 | 1979-05-01 | 27 | Details |
| US4106061A | Density control for ink jet copier | Expired / Lapsed | 1977-03-03 | 1978-08-08 | 14 | Details |
| US4088411A | Length measurement apparatus for continuously advancing art… | Expired / Lapsed | 1976-04-29 | 1978-05-09 | 2 | Details |
| US4084259A | Apparatus for dot matrix recording | Expired / Lapsed | 1974-10-11 | 1978-04-11 | 7 | Details |
| US4042335A | Integral element for analysis of liquids | Expired / Lapsed | 1976-06-25 | 1977-08-16 | 28 | Details |
| US4035356A | Copolyester prepared from an acyloxybenzoic acid and polyet… | Expired / Lapsed | 1976-05-07 | 1977-07-12 | 7 | Details |
| US4026668A | Control apparatus for silver halide emulsion making | Expired / Lapsed | 1975-11-24 | 1977-05-31 | 3 | Details |
| US4000493A | Acoustooptic scanner apparatus and method | Expired / Lapsed | 1975-11-03 | 1976-12-28 | 35 | Details |
| US3983005A | Integral element for the analysis of cholesterol | Expired / Lapsed | 1975-04-07 | 1976-09-28 | 81 | Details |
| US3971065A | Color imaging array | Expired / Lapsed | 1975-03-05 | 1976-07-20 | 14 | Details |
| US3958991A | Supersensitizing dye combination for electrophotographic co… | Expired / Lapsed | 1974-08-07 | 1976-05-25 | 14 | Details |
| US3887939A | Scanning apparatus and method using sharp and unsharp spots | Expired / Lapsed | 1973-04-23 | 1975-06-03 | 12 | Details |
| US3880657A | Conducting layer for organic photoconductive element | Expired / Lapsed | 1974-07-08 | 1975-04-29 | 17 | Details |
| US3876106A | Toner concentration monitoring apparatus utilizing programm… | Expired / Lapsed | 1973-10-01 | 1975-04-08 | 7 | Details |
| US3835332A | Inspection apparatus for detecting defects in a web | Expired / Lapsed | 1973-06-04 | 1974-09-10 | 22 | Details |
| US3793805A | Method and apparatus for removing air from a liquid | Expired / Lapsed | 1971-12-13 | 1974-02-26 | 9 | Details |
| US3759614A | Dual photocell range finder apparatus | Expired / Lapsed | 1971-02-10 | 1973-09-18 | 10 | Details |
| US3745160A | Novel borinium cyanine dyes | Expired / Lapsed | 1970-10-30 | 1973-07-10 | 0 | Details |
| US3700320A | Automatic searching system | Expired / Lapsed | 1970-09-03 | 1972-10-24 | 12 | Details |
| US3689693A | Multiple head ink drop graphic generator | Expired / Lapsed | 1970-11-17 | 1972-09-05 | 9 | Details |
| US3646353A | Flying spot scanner blanking | Expired / Lapsed | 1970-10-19 | 1972-02-29 | 17 | Details |
| US3645941A | Method of preparing 2-p-dioxanone polymers | Expired / Lapsed | 1970-04-01 | 1972-02-29 | 0 | Details |
| US3636150A | Process for preparing cellulose ester reverse osmosis membr… | Expired / Lapsed | 1969-11-28 | 1972-01-18 | 0 | Details |
| US3623811A | Electrooptical rangefinder means | Expired / Lapsed | 1970-10-30 | 1971-11-30 | 12 | Details |
| US3604846A | Method and system for reconstruction of half-tone images | Expired / Lapsed | 1969-03-03 | 1971-09-14 | 16 | Details |
| US3592671A | Stabilization of cellulose ester dopes | Expired / Lapsed | 1969-12-22 | 1971-07-13 | 0 | Details |
| US3561344A | Electronic replenishment apparatus for photographic process… | Expired / Lapsed | 1968-05-23 | 1971-02-09 | 5 | Details |
| US3553429A | Temperature control circuit | Expired / Lapsed | 1968-11-18 | 1971-01-05 | 20 | Details |
| US3522335A | Methods for producing reverse osmosis membrane and the comp… | Expired / Lapsed | 1968-02-29 | 1970-07-28 | 0 | Details |
| US3522328A | Modified polyester compositions containing polyamides prepa… | Expired / Lapsed | 1967-10-11 | 1970-07-28 | 0 | Details |
| US3516957A | Thermoplastic polyester composition containing organic este… | Expired / Lapsed | 1968-04-29 | 1970-06-23 | 0 | Details |
| US3489146A | Artificial kidney system | Expired / Lapsed | 1967-01-12 | 1970-01-13 | 0 | Details |
| US3482574A | Artificial kidney system provided with a lever actuated shu… | Expired / Lapsed | 1967-01-12 | 1969-12-09 | 0 | Details |
| US3475356A | Solvent resistant cross-linked polymers derived from cellul… | Expired / Lapsed | 1966-01-27 | 1969-10-28 | 0 | Details |
| US3454694A | Method of forming plastic book backs | Expired / Lapsed | 1967-08-16 | 1969-07-08 | 0 | Details |
| US3435744A | Automatic focusing system | Expired / Lapsed | 1966-05-31 | 1969-04-01 | 0 | Details |
| US3407405A | Recorder for producing composite diffraction grating pattern | Expired / Lapsed | 1966-05-18 | 1968-10-22 | 0 | Details |
| US3364497A | Recording of digital data | Expired / Lapsed | 1966-05-18 | 1968-01-16 | 0 | Details |
| US3312955A | System for recording and retrieving digital information | Expired / Lapsed | 1963-09-03 | 1967-04-04 | 1 | Details |
| US3295429A | Electromagnetic relay exposure controls | Expired / Lapsed | 1964-05-12 | 1967-01-03 | 2 | Details |
| US3265529A | Breathable fabric with a layer of water-sweliable elastomer | Expired / Lapsed | 1962-11-20 | 1966-08-09 | 2 | Details |
| US3265496A | Photoconductive substances for electrophotography | Expired / Lapsed | 1961-12-29 | 1966-08-09 | 2 | Details |
| US3253523A | Photoelectric exposure control system | Expired / Lapsed | 1963-03-18 | 1966-05-31 | 2 | Details |
| US3241438A | Cylindrical lens scanning system | Expired / Lapsed | 1963-06-18 | 1966-03-22 | 2 | Details |
| US3232606A | Film feeding arrangement | Expired / Lapsed | 1964-03-27 | 1966-02-01 | 2 | Details |
| US3232201A | Fiber optical scanning system | Expired / Lapsed | 1963-08-14 | 1966-02-01 | 2 | Details |
| US3194791A | Tin salts catalysts for polyesterification process | Expired / Lapsed | 1962-02-23 | 1965-07-13 | 0 | Details |
| US3194718A | Laminated tape structure | Expired / Lapsed | 1961-11-24 | 1965-07-13 | 2 | Details |
| US3194717A | Laminated tape structure | Expired / Lapsed | 1961-11-24 | 1965-07-13 | 2 | Details |
| US3120782A | Exposure control system for color printers | Expired / Lapsed | 1961-03-27 | 1964-02-11 | 2 | Details |
| US3004004A | Hydrophilic polypeptides and their preparation | Expired / Lapsed | 1958-03-26 | 1961-10-10 | 2 | Details |
| US2996405A | Method of quick-setting proteincontaining coatings | Expired / Lapsed | 1956-07-05 | 1961-08-15 | 2 | Details |
| US2992201A | Extrusion composition consisting of polyethylene and liquid… | Expired / Lapsed | 1958-04-09 | 1961-07-11 | 2 | Details |
| US2964636A | Optically immersed photoconductive cells | Expired / Lapsed | 1956-06-05 | 1960-12-13 | 0 | Details |
| US2932692A | Device for printing a selection character on address labels | Expired / Lapsed | 1959-05-07 | 1960-04-12 | 0 | Details |
| US2921828A | Surface treating polyester films and fibers with primary am… | Expired / Lapsed | 1956-12-03 | 1960-01-19 | 2 | Details |
| US2882262A | N-(acryloxyalkyl)- and n-(methacryloxyalkyl)-2-pyrrolidones… | Expired / Lapsed | 1956-05-14 | 1959-04-14 | 2 | Details |
| US2856386A | Allyl carbamate homopolymers and copolymers | Expired / Lapsed | 1954-02-01 | 1958-10-14 | 2 | Details |
| US2843580A | Metallized azo dyes prepared by coupling amino-phenols to d… | Expired / Lapsed | 1956-04-04 | 1958-07-15 | 2 | Details |
| US2835582A | Gelatin-polymeric hydrosol mixtures and photographic articl… | Expired / Lapsed | 1954-02-03 | 1958-05-20 | 1 | Details |
| US2831832A | Copolyesters of a glycol, sulfonyldi-benzoic acid and omega… | Expired / Lapsed | 1954-09-09 | 1958-04-22 | 2 | Details |
| US2827450A | 2-aminothiophene azo compounds | Expired / Lapsed | 1955-08-12 | 1958-03-18 | 2 | Details |
| US2808518A | Adjusting d. c. resistance of lightsensitive cells | Expired / Lapsed | 1956-01-06 | 1957-10-01 | 0 | Details |
| US2808390A | Interpolyesters from aromatic dibasic acids and omega-hydro… | Expired / Lapsed | 1954-07-26 | 1957-10-01 | 2 | Details |
| US2801188A | Coated gelating light filter | Expired / Lapsed | 1955-03-17 | 1957-07-30 | 1 | Details |
| US2795328A | Sorting device for information bearing elements | Expired / Lapsed | 1955-02-23 | 1957-06-11 | 0 | Details |
| US2794742A | Photographic elements and their preparation | Expired / Lapsed | 1955-08-03 | 1957-06-04 | 2 | Details |
| US2784115A | Method of producing titanium dioxide coatings | Expired / Lapsed | 1953-05-04 | 1957-03-05 | 1 | Details |
| US2784251A | Apparatus for translating into legible form characters repr… | Expired / Lapsed | 1950-08-24 | 1957-03-05 | 0 | Details |
| US2767474A | Footage indicator for strip material | Expired / Lapsed | 1953-06-15 | 1956-10-23 | 0 | Details |
| US2743261A | Copolymer of alpha-dibutylphosphonatostyrene and acrylonitr… | Expired / Lapsed | 1953-01-21 | 1956-04-24 | 0 | Details |
| US2720507A | Organo-metallic tin catalysts for preparation of polyesters | Expired / Lapsed | 1952-10-03 | 1955-10-11 | 2 | Details |
| US2720505A | Tetra-alkyl lead catalysts for the preparation of polyesters | Expired / Lapsed | 1952-10-03 | 1955-10-11 | 2 | Details |
| US2698794A | Mixed packet photographic emulsions | Expired / Lapsed | 1950-04-15 | 1955-01-04 | 2 | Details |
| US2691696A | Electrooptical unsharp masking in color reproduction | Expired / Lapsed | 1950-10-27 | 1954-10-12 | 0 | Details |
| US2688155A | Apparatus and method for controlling the application of pla… | Expired / Lapsed | 1953-03-16 | 1954-09-07 | 0 | Details |
| US2675315A | Photosensitive coating containing a hydrophilic colloid and… | Expired / Lapsed | 1949-12-13 | 1954-04-13 | 2 | Details |
| US2659652A | High-speed multiplex recording apparatus | Expired / Lapsed | 1950-07-18 | 1953-11-17 | 0 | Details |
| US2657191A | Polymerization of acrylonitrile in the presence of preforme… | Expired / Lapsed | 1950-12-01 | 1953-10-27 | 2 | Details |
| US2656360A | Process for preparing n-acyl derivatives of maide compounds | Expired / Lapsed | 1951-05-23 | 1953-10-20 | 2 | Details |
| US2652345A | Method of setting protein containing coatings with ammonium | Expired / Lapsed | 1952-04-29 | 1953-09-15 | 1 | Details |
| US2649387A | Method of forming nonreflecting coating on glass | Expired / Lapsed | 1950-10-27 | 1953-08-18 | 2 | Details |
| US2632204A | Apparatus for the continuous extrusion of decorative thermo… | Expired / Lapsed | 1951-02-14 | 1953-03-24 | 0 | Details |
| US2632369A | Film measuring mechanism | Expired / Lapsed | 1949-10-22 | 1953-03-24 | 0 | Details |
| US2620324A | Polymerization of acrylonitrile in the presence of amide po… | Expired / Lapsed | 1950-12-01 | 1952-12-02 | 2 | Details |
| US2618702A | Variable underlap drum facsimile transmitting apparatus | Expired / Lapsed | 1950-06-23 | 1952-11-18 | 0 | Details |
| US2614430A | Temperature indicating device | Expired / Lapsed | 1950-02-01 | 1952-10-21 | 0 | Details |
| US2607267A | Optical system for the inspection of curved profiles | Expired / Lapsed | 1950-03-29 | 1952-08-19 | 0 | Details |
| US2604002A | Optical infinity sight | Expired / Lapsed | 1944-11-28 | 1952-07-22 | 0 | Details |
| US2596741A | External memory device for electronic digital computers | Expired / Lapsed | 1948-08-28 | 1952-05-13 | 0 | Details |
| US2592260A | Can sorting machine | Expired / Lapsed | 1949-01-19 | 1952-04-08 | 0 | Details |
| US2589014A | Focusing view finder system | Expired / Lapsed | 1951-02-14 | 1952-03-11 | 0 | Details |
| US2575017A | Apparatus for synthesizing facsimile signals from coded sig… | Expired / Lapsed | 1950-07-29 | 1951-11-13 | 0 | Details |
| US2563780A | Optical aligning device | Expired / Lapsed | 1950-03-07 | 1951-08-07 | 0 | Details |
| US2560646A | Oil vapor pump | Expired / Lapsed | 1948-06-04 | 1951-07-17 | 0 | Details |
| US2556550A | Heat sensitive printing element and method | Expired / Lapsed | 1947-02-27 | 1951-06-12 | 0 | Details |
| US2548573A | Apparatus for processing continuous film | Expired / Lapsed | 1946-12-17 | 1951-04-10 | 0 | Details |
| US2544879A | Film metering double exposure prevention camera | Expired / Lapsed | 1947-09-18 | 1951-03-13 | 0 | Details |
| US2543013A | Printing plate and method of printing | Expired / Lapsed | 1947-04-30 | 1951-02-27 | 2 | Details |
| US2533530A | Photosensitive coating containing rubber latex | Expired / Lapsed | 1947-05-03 | 1950-12-12 | 1 | Details |
| US2532315A | Apparatus and process for evacuating electronic tubes and t… | Expired / Lapsed | 1949-04-02 | 1950-12-05 | 0 | Details |
| US2521902A | N-fluoroalkylacrylamides and polymers thereof | Expired / Lapsed | 1948-04-06 | 1950-09-12 | 2 | Details |
| US2518671A | Focusing mechanism for lens mounts | Expired / Lapsed | 1947-05-10 | 1950-08-15 | 0 | Details |
| US2510200A | Facsimile system with selected area scanning | Expired / Lapsed | 1948-01-21 | 1950-06-06 | 0 | Details |
| US2503714A | Filter holder for projectors | Expired / Lapsed | 1948-12-08 | 1950-04-11 | 0 | Details |
| US2500218A | Process for preparing 1, 1, 1-trifluoro-2-bromoethane | Expired / Lapsed | 1947-10-24 | 1950-03-14 | 2 | Details |
| US2500028A | Fine-grained bichromate sensitized photographic material | Expired / Lapsed | 1948-07-09 | 1950-03-07 | 2 | Details |
| US2500051A | Optical projection system for inspecting alignment of typew… | Expired / Lapsed | 1947-06-02 | 1950-03-07 | 0 | Details |
| US2500049A | Apparatus for making color prints | Expired / Lapsed | 1946-05-10 | 1950-03-07 | 0 | Details |
| US2496928A | Bayonet lock | Expired / Lapsed | 1947-12-06 | 1950-02-07 | 0 | Details |
| US2496933A | Linear polyesters of hydroquinone, saturated glycols and di… | Expired / Lapsed | 1946-05-25 | 1950-02-07 | 2 | Details |
| US2487885A | Copolymers of beta-propionolactone | Expired / Lapsed | 1947-09-12 | 1949-11-15 | 0 | Details |
| US2486190A | Imidized polyacrylamides | Expired / Lapsed | 1946-07-22 | 1949-10-25 | 0 | Details |
| US2484487A | Process for preparing glycol monoesters of acrylic and alph… | Expired / Lapsed | 1948-09-08 | 1949-10-11 | 0 | Details |
| US2478384A | Control device for projection printers | Expired / Lapsed | 1946-01-12 | 1949-08-09 | 0 | Details |
| US2476426A | Apparatus for testing porro prisms using nonparallel light | Expired / Lapsed | 1945-05-02 | 1949-07-19 | 0 | Details |
| US2472605A | Method of depositing optical interference coatings | Expired / Lapsed | 1946-04-15 | 1949-06-07 | 0 | Details |
| US2466507A | Method of making fluoride glass | Expired / Lapsed | 1946-05-15 | 1949-04-05 | 0 | Details |
| US2466506A | Fluoride glasses | Expired / Lapsed | 1946-04-06 | 1949-04-05 | 0 | Details |
| US2466455A | Reflecting means for folding the light path in optical syst… | Expired / Lapsed | 1946-03-30 | 1949-04-05 | 0 | Details |
| US2466430A | Construction for projection lamps | Expired / Lapsed | 1945-03-31 | 1949-04-05 | 0 | Details |
| US2466404A | Polyvinyl carbamates | Expired / Lapsed | 1944-03-08 | 1949-04-05 | 0 | Details |
| US2458448A | Gun training by tracer fire spotting | Expired / Lapsed | 1944-02-26 | 1949-01-04 | 0 | Details |
| US2455731A | Resinous condensates of beta-propionolactone and polyhydrox… | Expired / Lapsed | 1947-09-10 | 1948-12-07 | 0 | Details |
| US2455790A | Enteric coatings | Expired / Lapsed | 1945-06-09 | 1948-12-07 | 0 | Details |
| US2455763A | Interferometric light valve | Expired / Lapsed | 1945-03-31 | 1948-12-07 | 0 | Details |
| US2450751A | Constant flow pump | Expired / Lapsed | 1946-03-07 | 1948-10-05 | 0 | Details |
| US2450761A | Flicker photometers, particularly for measuring the contras… | Expired / Lapsed | 1945-06-09 | 1948-10-05 | 0 | Details |
| US2448892A | Oxidation of cellulose | Expired / Lapsed | 1945-01-01 | 1948-09-07 | 0 | Details |
| US2446628A | Flatness testing apparatus | Expired / Lapsed | 1947-03-06 | 1948-08-10 | 0 | Details |
| US2446668A | Combined camera, processing apparatus, and projector | Expired / Lapsed | 1945-06-19 | 1948-08-10 | 0 | Details |
| US2439081A | Polymers of cyanoacrylic acid derivatives | Expired / Lapsed | 1944-05-05 | 1948-04-06 | 0 | Details |
| US2430585A | Lubricated photographic film and process of preparation | Expired / Lapsed | 1944-03-01 | 1947-11-11 | 0 | Details |
| US2425390A | Forming flanged or beaded containers | Expired / Lapsed | 1946-01-15 | 1947-08-12 | 0 | Details |
| US2423707A | Fabric or gauze of uniformly oxidized cellulose | Expired / Lapsed | 1945-03-02 | 1947-07-08 | 0 | Details |
| US2417404A | Resinous copolymer of a diacylated of an unsaturated aldehy… | Expired / Lapsed | 1943-05-25 | 1947-03-11 | 0 | Details |
| US2413399A | Artificial horizon | Expired / Lapsed | 1943-08-24 | 1946-12-31 | 0 | Details |
| US2410667A | Artificial horizon for sighting instruments | Expired / Lapsed | 1944-04-18 | 1946-11-05 | 0 | Details |
| US2405729A | Four-component objective | Expired / Lapsed | 1943-11-20 | 1946-08-13 | 0 | Details |
| US2403892A | Photographing device | Expired / Lapsed | 1944-10-27 | 1946-07-09 | 0 | Details |
| US2403734A | Bottle cap | Expired / Lapsed | 1943-10-23 | 1946-07-09 | 0 | Details |
| US2403731A | Beam splitter | Expired / Lapsed | 1943-04-01 | 1946-07-09 | 0 | Details |
| US2403730A | Explosively actuated high-speed shutter | Expired / Lapsed | 1943-03-27 | 1946-07-09 | 0 | Details |
| US2403004A | Deesterification of copolymers of acrylic esters and vinyl … | Expired / Lapsed | 1942-07-10 | 1946-07-02 | 0 | Details |
| US2401705A | Range finder | Expired / Lapsed | 1943-03-13 | 1946-06-04 | 0 | Details |
| US2401691A | Photoelectric range finder | Expired / Lapsed | 1941-07-18 | 1946-06-04 | 0 | Details |
| US2394635A | Magnifying lens system | Expired / Lapsed | 1944-07-13 | 1946-02-12 | 0 | Details |
| US2394930A | Formation of mirrors by thermal evaporation | Expired / Lapsed | 1943-07-03 | 1946-02-12 | 0 | Details |
| US2393782A | Ocular | Expired / Lapsed | 1943-05-01 | 1946-01-29 | 0 | Details |
| US2391127A | Antihalation coatings | Expired / Lapsed | 1942-02-17 | 1945-12-18 | 0 | Details |
| US2386626A | Drawing surface | Expired / Lapsed | 1943-01-30 | 1945-10-09 | 0 | Details |
| US2382640A | Resinous polymer of methylene dioxolane | Expired / Lapsed | 1943-09-08 | 1945-08-14 | 0 | Details |
| US2376207A | Drier for photographic material | Expired / Lapsed | 1943-08-21 | 1945-05-15 | 0 | Details |
| US2374475A | Sighting device | Expired / Lapsed | 1944-01-17 | 1945-04-24 | 0 | Details |
| US2350742A | Gelation coating process | Expired / Lapsed | 1940-12-19 | 1944-06-06 | 0 | Details |
| US2350112A | Lens system | Expired / Lapsed | 1942-03-02 | 1944-05-30 | 0 | Details |
| US2341431A | Lamp socket | Expired / Lapsed | 1942-06-22 | 1944-02-08 | 0 | Details |
| US2338654A | Projection screen | Expired / Lapsed | 1942-04-08 | 1944-01-04 | 0 | Details |
| US2338657A | Shutter and camera structure | Expired / Lapsed | 1942-01-30 | 1944-01-04 | 0 | Details |
| US2338587A | Method of treating cellulose esters | Expired / Lapsed | 1941-02-24 | 1944-01-04 | 0 | Details |
| US2336330A | Range finder | Expired / Lapsed | 1941-07-19 | 1943-12-07 | 0 | Details |
| US2336292A | Process for forming decorative sheeting | Expired / Lapsed | 1941-02-04 | 1943-12-07 | 0 | Details |
| US2333772A | Speed control for motor driven cameras | Expired / Lapsed | 1942-06-04 | 1943-11-09 | 0 | Details |
| US2333768A | Aerial camera | Expired / Lapsed | 1941-06-23 | 1943-11-09 | 0 | Details |
| US2333770A | Conditioning cellulose acetate yarn | Expired / Lapsed | 1938-12-16 | 1943-11-09 | 0 | Details |
| US2327811A | Engraving machine | Expired / Lapsed | 1942-04-01 | 1943-08-24 | 0 | Details |
| US2322044A | Photographic estimating and calculating device | Expired / Lapsed | 1941-08-15 | 1943-06-15 | 0 | Details |
| US2322027A | Color photography | Expired / Lapsed | 1940-12-26 | 1943-06-15 | 0 | Details |
| US2313543A | Electro-optical system | Expired / Lapsed | 1941-11-01 | 1943-03-09 | 0 | Details |
| US2313565A | Resin and its preparation | Expired / Lapsed | 1939-10-31 | 1943-03-09 | 0 | Details |
| US2311059A | Photographic silver halide emulsion | Expired / Lapsed | 1941-10-30 | 1943-02-16 | 0 | Details |
| US2311101A | Densitometer | Expired / Lapsed | 1941-03-06 | 1943-02-16 | 0 | Details |
| US2308015A | Sound reproduction | Expired / Lapsed | 1940-10-18 | 1943-01-12 | 0 | Details |
| US2307783A | Method of coating | Expired / Lapsed | 1939-05-24 | 1943-01-12 | 0 | Details |
| US2304984A | Lens mount | Expired / Lapsed | 1939-07-25 | 1942-12-15 | 0 | Details |
| US2295000A | Rapid selector-calculator | Expired / Lapsed | 1938-06-23 | 1942-09-08 | 0 | Details |
| US2292312A | Stereoscopic film mount | Expired / Lapsed | 1940-06-18 | 1942-08-04 | 0 | Details |
| US2289753A | Air squeegee | Expired / Lapsed | 1939-06-17 | 1942-07-14 | 0 | Details |
| US2286730A | Electric circuit for color correction | Expired / Lapsed | 1941-05-14 | 1942-06-16 | 0 | Details |
| US2279501A | Yarn conditioning process and compositions therefor | Expired / Lapsed | 1940-10-09 | 1942-04-14 | 0 | Details |
| US2279502A | Yarn conditioning process and composition therefor | Expired / Lapsed | 1940-10-09 | 1942-04-14 | 0 | Details |
| US2279463A | Film handling apparatus | Expired / Lapsed | 1939-12-27 | 1942-04-14 | 0 | Details |
| US2276323A | Photographic silver halide emulsion | Expired / Lapsed | 1940-12-05 | 1942-03-17 | 0 | Details |
| US2263008A | Holder for lenses during surface coating | Expired / Lapsed | 1940-09-28 | 1941-11-18 | 0 | Details |
| US2262989A | Method for forming thermoplastic sheeting | Expired / Lapsed | 1938-03-26 | 1941-11-18 | 0 | Details |
| US2256391A | Method for preparing oxidized cellulose | Expired / Lapsed | 1940-12-05 | 1941-09-16 | 0 | Details |
| US2253086A | Color photography | Expired / Lapsed | 1937-01-16 | 1941-08-19 | 0 | Details |
| US2249538A | Reversible gel compositions of polyvinyl alcohol and substi… | Expired / Lapsed | 1940-02-12 | 1941-07-15 | 0 | Details |
| US2245257A | Lens mount | Expired / Lapsed | 1939-07-25 | 1941-06-10 | 0 | Details |
| US2245429A | Manufacture of photographic film base | Expired / Lapsed | 1937-05-18 | 1941-06-10 | 0 | Details |
| US2241225A | Curing of synthetic resin films | Expired / Lapsed | 1939-12-09 | 1941-05-06 | 0 | Details |
| US2241231A | Friction drive for photographic apparatus of the magazine t… | Expired / Lapsed | 1938-07-07 | 1941-05-06 | 0 | Details |
| US2238482A | Footage indicator for film handling apparatus | Expired / Lapsed | 1939-05-06 | 1941-04-15 | 0 | Details |
| US2232990A | Preparation of oxycellulose | Expired / Lapsed | 1938-07-15 | 1941-02-25 | 0 | Details |
| US2231743A | Roll film holder for projectors | Expired / Lapsed | 1939-02-11 | 1941-02-11 | 0 | Details |
| US2229848A | Indicator for photographic apparatus | Expired / Lapsed | 1940-03-28 | 1941-01-28 | 0 | Details |
| US2218241A | Double exposure prevention device | Expired / Lapsed | 1939-08-12 | 1940-10-15 | 0 | Details |
| US2218253A | Method and means for measuring color | Expired / Lapsed | 1938-02-23 | 1940-10-15 | 0 | Details |
| US2213734A | Photographic copying apparatus | Expired / Lapsed | 1938-05-18 | 1940-09-03 | 0 | Details |
| US2210886A | Safety control for square cutters | Expired / Lapsed | 1938-03-04 | 1940-08-13 | 0 | Details |
| US2196768A | Enteric coating | Expired / Lapsed | 1938-03-11 | 1940-04-09 | 0 | Details |
| US2196738A | Motion picture apparatus | Expired / Lapsed | 1938-01-21 | 1940-04-09 | 0 | Details |
| US2184018A | Lens attachment | Expired / Lapsed | 1937-09-23 | 1939-12-19 | 0 | Details |
| US2183520A | Film forming process and product | Expired / Lapsed | 1936-02-15 | 1939-12-19 | 0 | Details |
| US2177658A | Method for feeding thermoplastic materials | Expired / Lapsed | 1937-02-25 | 1939-10-31 | 0 | Details |
| US2177633A | Method and apparatus for making thermoplastic sheeting | Expired / Lapsed | 1937-02-25 | 1939-10-31 | 0 | Details |
| US2168987A | Film feeding mechanism | Expired / Lapsed | 1937-06-24 | 1939-08-08 | 0 | Details |
| US2165414A | Cable release for time exposures | Expired / Lapsed | 1937-12-08 | 1939-07-11 | 0 | Details |
| US2165362A | Driving mechanism for motion picture apparatus | Expired / Lapsed | 1937-04-17 | 1939-07-11 | 0 | Details |
| US2165341A | Photographic objective | Expired / Lapsed | 1936-07-28 | 1939-07-11 | 0 | Details |
| US2153198A | Range and view finder system for cameras | Expired / Lapsed | 1936-08-01 | 1939-04-04 | 0 | Details |
| US2153220A | Ejector for motion picture apparatus of the magazine type | Expired / Lapsed | 1935-01-11 | 1939-04-04 | 0 | Details |
| US2150678A | Condenser | Expired / Lapsed | 1936-09-09 | 1939-03-14 | 0 | Details |
| US2147415A | Electroplating | Expired / Lapsed | 1937-05-11 | 1939-02-14 | 0 | Details |
| US2131747A | Antihalation backing for photographic film | Expired / Lapsed | 1937-10-13 | 1938-10-04 | 0 | Details |
| US2129242A | Heat sensitive compositions | Expired / Lapsed | 1935-05-25 | 1938-09-06 | 0 | Details |
| US2129456A | Composite cellulose derivative sheeting | Expired / Lapsed | 1934-10-04 | 1938-09-06 | 0 | Details |
| US2127621A | Photographic emulsions | Expired / Lapsed | 1936-04-16 | 1938-08-23 | 0 | Details |
| US2127340A | Photographic emulsion containing supersensitized thiazoloca… | Expired / Lapsed | 1937-03-29 | 1938-08-16 | 0 | Details |
| US2126299A | Clutch connection for motion picture apparatus of the magaz… | Expired / Lapsed | 1936-04-24 | 1938-08-09 | 0 | Details |
| US2117797A | Photographic paper punching machine | Expired / Lapsed | 1937-06-17 | 1938-05-17 | 0 | Details |
| US2110477A | Lens mount construction | Expired / Lapsed | 1936-02-04 | 1938-03-08 | 0 | Details |
| US2108503A | Coloring materials | Expired / Lapsed | 1935-06-19 | 1938-02-15 | 0 | Details |
| US2099297A | Photographic material and process | Expired / Lapsed | 1936-06-23 | 1937-11-16 | 0 | Details |
| US2090017A | Stereocamera | Expired / Lapsed | 1936-11-13 | 1937-08-17 | 0 | Details |
| US2083646A | Motor drive for motion picture cameras | Expired / Lapsed | 1934-07-03 | 1937-06-15 | 0 | Details |
| US2083628A | Method of making vinyl derivative articles | Expired / Lapsed | 1934-01-10 | 1937-06-15 | 0 | Details |
| US2080021A | Motion picture apparatus control mechanism | Expired / Lapsed | 1935-02-16 | 1937-05-11 | 0 | Details |
| US2077298A | Process for the extraction of halogen from fluids | Expired / Lapsed | 1935-03-16 | 1937-04-13 | 0 | Details |
| US2063312A | Printing machine lamp house | Expired / Lapsed | 1935-04-02 | 1936-12-08 | 0 | Details |
| US2058532A | Exposure control for cameras | Expired / Lapsed | 1934-09-18 | 1936-10-27 | 0 | Details |
| US2042443A | Adjustable supporting pillar or the like | Expired / Lapsed | 1936-03-13 | 1936-05-26 | 0 | Details |
| US2029930A | Cam follower for a strip advancing mechanism | Expired / Lapsed | 1934-11-30 | 1936-02-04 | 0 | Details |
| US2019737A | Sensitive photographic material | Expired / Lapsed | 1934-05-18 | 1935-11-05 | 0 | Details |
| US2019921A | Process for stabilizing cellulose esters | Expired / Lapsed | 1933-06-13 | 1935-11-05 | 0 | Details |
| US2008982A | Device for producing enlarged images | Expired / Lapsed | 1934-02-01 | 1935-07-23 | 0 | Details |
| US1991107A | Cellulose acetate-carbamate | Expired / Lapsed | 1932-04-27 | 1935-02-12 | 0 | Details |
| US1976355A | Speed control for bands | Expired / Lapsed | 1930-02-15 | 1934-10-09 | 0 | Details |
| US1973470A | Photographic printing apparatus | Expired / Lapsed | 1931-05-11 | 1934-09-11 | 0 | Details |
| US1973468A | Method and means for photographic printing | Expired / Lapsed | 1931-05-08 | 1934-09-11 | 0 | Details |
| US1973469A | Automatic control for photographic printing exposures | Expired / Lapsed | 1931-04-23 | 1934-09-11 | 0 | Details |
| US1969465A | Means for maintaining moving bands in synchronism | Expired / Lapsed | 1932-07-29 | 1934-08-07 | 0 | Details |
| US1954338A | Apparatus for photographic printing | Expired / Lapsed | 1929-06-19 | 1934-04-10 | 0 | Details |
| US1939232A | Chemigraphic materials | Expired / Lapsed | 1932-07-13 | 1933-12-12 | 0 | Details |
| US1939235A | Process of making cellulose acetate | Expired / Lapsed | 1928-12-22 | 1933-12-12 | 0 | Details |
| US1933804A | Regeneration of photographic developers | Expired / Lapsed | 1932-01-20 | 1933-11-07 | 0 | Details |
| US1933803A | Hygrometer | Expired / Lapsed | 1929-01-03 | 1933-11-07 | 0 | Details |
| US1925557A | Photographic developer with alkali substitute | Expired / Lapsed | 1932-02-02 | 1933-09-05 | 0 | Details |
| US1925546A | X-ray intensifying screen | Expired / Lapsed | 1931-10-27 | 1933-09-05 | 0 | Details |
| US1917370A | Duplicating process | Expired / Lapsed | 1932-07-13 | 1933-07-11 | 0 | Details |
| US1917379A | Automatic gloss meter | Expired / Lapsed | 1928-08-02 | 1933-07-11 | 0 | Details |
| US1908610A | Automatic control for photographic printing exposures | Expired / Lapsed | 1927-03-30 | 1933-05-09 | 0 | Details |
| US1897843A | Light sensitive tropochromic coating | Expired / Lapsed | 1930-08-07 | 1933-02-14 | 0 | Details |
| US1880503A | Ultra-violet sensitive layer | Expired / Lapsed | 1931-05-12 | 1932-10-04 | 0 | Details |
| US1880414A | Illuminating system for photographic apparatus | Expired / Lapsed | 1930-01-03 | 1932-10-04 | 0 | Details |
| US1878967A | Optical system for projection of color pictures | Expired / Lapsed | 1929-07-01 | 1932-09-20 | 0 | Details |
| US1866718A | Method and apparatus for focusing lenses | Expired / Lapsed | 1930-05-14 | 1932-07-12 | 0 | Details |
| US1861918A | Process of conditioning photographic films | Expired / Lapsed | 1928-01-30 | 1932-06-07 | 0 | Details |
| US1831796A | Method and apparatus for reproducing photographic sound rec… | Expired / Lapsed | 1930-03-21 | 1931-11-10 | 0 | Details |
| US1831790A | Roll film photographic camera and the like | Expired / Lapsed | 1930-03-19 | 1931-11-10 | 0 | Details |
| US1826664A | Indicating device for document photographing apparatus | Expired / Lapsed | 1929-05-23 | 1931-10-06 | 0 | Details |
| US1787808A | Optical system for photographic apparatus | Expired / Lapsed | 1928-09-04 | 1931-01-06 | 0 | Details |
| US1762932A | Projection system for color pictures | Expired / Lapsed | 1927-05-11 | 1930-06-10 | 0 | Details |
| US1690602A | Optical instrument | Expired / Lapsed | 1924-06-27 | 1928-11-06 | 0 | Details |
| US1688441A | Lens-attachment mount for photographic apparatus | Expired / Lapsed | 1928-01-17 | 1928-10-23 | 0 | Details |
| US1661757A | Mobile color projector | Expired / Lapsed | 1924-12-19 | 1928-03-06 | 0 | Details |
| US1651733A | Nondusting carbon pigment and process of making the same | Expired / Lapsed | 1926-11-26 | 1927-12-06 | 0 | Details |
| US1602589A | Photographic emulsion with mercury compound and process of … | Expired / Lapsed | 1925-11-04 | 1926-10-12 | 0 | Details |
| US1507212A | Lens | Expired / Lapsed | 1920-11-29 | 1924-09-02 | 0 | Details |
| US1260356A | Film-camera. | Expired / Lapsed | 1915-10-25 | 1918-03-26 | 0 | Details |
| US1139023A | Photographic exposing mechanism. | Expired / Lapsed | 1913-10-30 | 1915-05-11 | 0 | Details |
| US1112525A | Tripod-socket for camera-beds. | Expired / Lapsed | 1913-05-05 | 1914-10-06 | 0 | Details |
| US932381A | Photographic shutter. | Expired / Lapsed | 1907-01-24 | 1909-08-24 | 0 | Details |