US3375112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binder-free silver halide photographic process
Assignee: Technical Operations Inc
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Filing: 1963-10-28
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Granted: 1968-03-26
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Ignatius E Theodorou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C1/494; G03C1/496; G03C1/4965; G03C1/7614; Y; Y10; Y10S; Y10S430/00; Y10S430/133; Y10S430/136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PHOTOGRAPHIC MEDIUM COMPRISING A SUPPORT SHEET, A FIRST HIGH MOLECULAR WEIGHT ORGANIC POLYMER DISPOSED IN A SUBBING LAYER ON A SURFACE OF SAID SHEET, A STRATUM OF SUBSTANTIALLY BINDER-FREE MICROCRYSTALLINE PHOTOSENSITIVE SILVER HALIDE DISPOSED ON SAID SUBBING LAYER, A SECOND HIGH MOLECULAR WEIGHT ORGANIC POLYMER DISPOSED ON SAID STRATUM, SAID POLYMERS BEING CHARACTERIZED IN THAT UPON EXPOSURE, DEVELOPMENT AND CHEMICAL FIXING OF SAID MEDIUM SAID POLYMERS COMBINE IN THE AREA OF SILVER FORMATION TO FORM AN INSOLUBILIZED POLYMERIC MATRIX IN WHICH DEVELOPED SILVER IS EMBEDDED, SAID POLYMERS BEING DIFFERENT AND EACH BEING SELECTED FROM THE GROUP CONSISTING OF POLY-N-METHYLETHYLENEIMINE, A COPOLYMER OF VINYLPYRROLIDONE AND VINYLACETATE, AND POLYVINYLBUTYRAL AND POLYVINYLPYRIDINE.
Claim 2
Dependent Claim
110 words
A PHOTOGRAPHIC MEDIUM COMPRISING A SUPPORT SHEET, A FIRST HIGH MOLECULAR WEIGHT ORGANIC POLYMER DISPOSED IN A SUBBING LAYER ON A SURFACE OF SAID SHEET, A STRATUM OF SUBSTANTIALLY BINDER-FREE MICROCRYSTALLINE PHOTOSENSITIVE SILVER HALIDE DISPOSED ON SAID SUBBING LAYER, A SECOND HIGH MOLECULAR WEIGHT ORGANIC POLYMER DISPOSED ON SAID STRATUM, SAID POLYMERS BEING CHARACTERIZED IN THAT UPON EXPOSURE, DEVELOPMENT AND CHEMICAL FIXING OF SAID MEDIUM SAID POLYMERS COMBINE IN THE AREA OF SILVER FORMATION TO FORM AN INSOLUBILIZED POLYMERIC MATRIX IN WHICH DEVELOPED SILVER IS EMBEDDED, SAID POLYMERS BEING DIFFERENT AND EACH BEING SELECTED FROM THE GROUP CONSISTING OF POLY-N-METHYLETHYLENEIMINE, A COPOLYMER OF VINYLPYRROLIDONE AND VINYLACETATE, AND POLYVINYLBUTYRAL AND POLYVINYLPYRIDINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |