US3000740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material
Assignee: Gevaert Photo Producten NV
•
Filing: 1956-09-25
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Granted: 1961-09-19
•
Expires: 1976-09-25
Abstract
No abstract record available.
Inventors
- 👤 Belder Maurice Hector De
- 👤 Hart Rene Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR MAKING COMPOSITION FOR USE IN THE MANUFACTURE OF LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL, WHICH COMPRISES THE STEPS OF PREPARING A SOLUTION OF A COPOLYMER OF VINYL CHLORIDE, VINYL ACETRATE AND MALERIC ANHYDRIDE IN A WATER-IMMISCIBLE ORGANIC SOLVENT, MIXING AN AQUEOUS GELATIN SOLVER HALIDE DISPERSION WITH SAID SOLUTION FOR THE PURPOSE OF EMULSFYING SAID DISPERSION, AND MIXING THE EMULSION THUS OBTAINED, FOR THE PURPOSE OF EMULSIFYING SAID EMULSION, WITH AN AQUEOUS SOLUTION OF HYDROPHILIC LAYER-FORMING BINDING AGENT SELECTED FROM THE GROUP CONSISTING OF GELATIN AND POLYVINYL ALCOHOL.
Claim 2
Dependent Claim
87 words
A PROCESS FOR MAKING COMPOSITION FOR USE IN THE MANUFACTURE OF LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL, WHICH COMPRISES THE STEPS OF PREPARING A SOLUTION OF A COPOLYMER OF VINYL CHLORIDE, VINYL ACETRATE AND MALERIC ANHYDRIDE IN A WATER-IMMISCIBLE ORGANIC SOLVENT, MIXING AN AQUEOUS GELATIN SOLVER HALIDE DISPERSION WITH SAID SOLUTION FOR THE PURPOSE OF EMULSFYING SAID DISPERSION, AND MIXING THE EMULSION THUS OBTAINED, FOR THE PURPOSE OF EMULSIFYING SAID EMULSION, WITH AN AQUEOUS SOLUTION OF HYDROPHILIC LAYER-FORMING BINDING AGENT SELECTED FROM THE GROUP CONSISTING OF GELATIN AND POLYVINYL ALCOHOL.
References Cited (Backward Citations)
US2304940A
Cited
US2698794A
Cited
US2763552A
Cited
GB718404A
Cited
US2735768A
Cited
US2698796A
Cited
US2772165A
Cited
US2893867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |