US3057722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic stripping film
Assignee: EIDP Inc
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Filing: 1958-08-07
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Granted: 1962-10-09
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Expires: 1978-08-07
Abstract
No abstract record available.
Inventors
- 👤 Alles Francis Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PHOTOGRAPHIC STRIPPING FILM COMPRISING A HYDROPHOBIC FILM BASE HAVING ONE SURFACE COATED IN ORDER WITH (A) A THIN LAYER OF GELATIN, (B) A STRIPPING LAYER CONSISTING OF (1) GELATIN CHARACTERIZED BY BEING A GEL AT NORMAL PHOTOGRAPHIC PROCESSING TEMPERATURES, AND (2) A WATER-SOLUBLE POLYVINYL ALCOHOL HAVING AN AVERAGE MOLECULAR WEIGHT OF 3,000 TO 70,000, SAID INGREDIENT (1) BEING PRESENT IN SAID STRIPPING LAYER IN A RATIO OF 1 TO 10 PARTS BY WEIGHT PER PART OF INGREDIENT (2), AND (C) AN UNHARDENED GELATION-SILVER HALIDE EMULSION LAYER, SAID FILM BEING CHARACTERIZED BY HAVING LAYER (B) ADJACENT TO LAYER (C).
Claim 2
Dependent Claim
99 words
A PHOTOGRAPHIC STRIPPING FILM COMPRISING A HYDROPHOBIC FILM BASE HAVING ONE SURFACE COATED IN ORDER WITH (A) A THIN LAYER OF GELATIN, (B) A STRIPPING LAYER CONSISTING OF (1) GELATIN CHARACTERIZED BY BEING A GEL AT NORMAL PHOTOGRAPHIC PROCESSING TEMPERATURES, AND (2) A WATER-SOLUBLE POLYVINYL ALCOHOL HAVING AN AVERAGE MOLECULAR WEIGHT OF 3,000 TO 70,000, SAID INGREDIENT (1) BEING PRESENT IN SAID STRIPPING LAYER IN A RATIO OF 1 TO 10 PARTS BY WEIGHT PER PART OF INGREDIENT (2), AND (C) AN UNHARDENED GELATION-SILVER HALIDE EMULSION LAYER, SAID FILM BEING CHARACTERIZED BY HAVING LAYER (B) ADJACENT TO LAYER (C).
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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |