Patent US2944119A successfully refreshed from Google Patents.
Patent US3220841A successfully refreshed from Google Patents.
US3220841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic film
Assignee: Eastman Kodak Co
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Filing: 1962-01-12
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Granted: 1965-11-30
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Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
- 👤 Stevens Guy William Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PHOTOGRAPHIC FILM COMPRISING A FILM SUPPORT CONTAINING ON ONE SIDE ONLY A BROMIDE ION CONTAINING GELATINSILVER HALIDE PHOTOGRAPHIC EMULSION LAYER, OF THE HALIDE OF WHICH BROMIDE COMPRISES A SUBSTANTIAL PROPORTION, AND ON THE OTHER SIDE A GELATIN BACKING LAYER, SAID BACKING LAYER CONTAINING BROMIDE ION OF A SALT HAVING THE PHOTOGRAPHICALLY INNOCUOUS CATION IN AN AMOUNT 0.25 TO 4 TIMES THE AMOUNT OF BROMIDE ION IN THE PHOTOGRAPHIC EMULSION LAYER.
Claim 2
Dependent Claim
71 words
A PHOTOGRAPHIC FILM COMPRISING A FILM SUPPORT CONTAINING ON ONE SIDE ONLY A BROMIDE ION CONTAINING GELATINSILVER HALIDE PHOTOGRAPHIC EMULSION LAYER, OF THE HALIDE OF WHICH BROMIDE COMPRISES A SUBSTANTIAL PROPORTION, AND ON THE OTHER SIDE A GELATIN BACKING LAYER, SAID BACKING LAYER CONTAINING BROMIDE ION OF A SALT HAVING THE PHOTOGRAPHICALLY INNOCUOUS CATION IN AN AMOUNT 0.25 TO 4 TIMES THE AMOUNT OF BROMIDE ION IN THE PHOTOGRAPHIC EMULSION LAYER.
References Cited (Backward Citations)
US1954337A
Cited
US2083675A
Cited
US2139767A
Cited
US2993793A
Cited
DE1013164B
Cited
US2913339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |