US2867542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelatin adhesive layers
Assignee: Gevaert Photo Producten NV
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Filing: 1955-05-24
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Granted: 1959-01-06
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Expires: 1975-05-24
Abstract
No abstract record available.
Inventors
- 👤 Keyser Lodewijk Felix De
- 👤 Lodewijk August Van Dessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C1/825; G03C1/835; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31728; Y10T428/31768; Y10T428/31772
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PHOTOGRAPHIC LIGHT-SENSETIVE MATERIAL INCLUDING A GELATIN SILVER HALIDE EMULSION LAYER, A FILM SUPPORT OF A CELLULOSE ESTER OF A LOWER FATTY ACID, AND A LAYER CONSISTING ESSENTIALLY OF A MIXTURE OF 90 TO 10 PARTS BY WEIGHT OF GELATIN AND 10 TO 90 PARTS BY WEIGHT OF ALGINYL NITRATE, THE LAST NAMED LAYER UNITING THE FIRST NAMED LAYER AND THE FILM SUPPORT.
References Cited (Backward Citations)
US2476240A
Cited
BE519733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |