US2843487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous gelatin coating compositions and their application
Assignee: Eastman Kodak Co
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Filing: 1955-02-02
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Granted: 1958-07-15
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Expires: 1975-02-02
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Knox
- 👤 John F Stenberg
- 👤 Charles V Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
AN AQUEOUS GELATIN COATING COMPOSITION COMPRISING AN AQUEOUS SOLUTION OF GELATIN OF 1 1/2-10% CONCENTRATION CONTAINING IN DISPERSION THEREIN A SILVER HALIDE WHICH SOLUTION ALSO CONTAINS A SMALL AMOUNT OF A COATING AID SELECTED FROM THE GROUP CONSISTING OF THE WATER SOLUBLE SALTS OF THE ESTERS OF ALIPHATIC MONOHYDROXY ALCOHOLS OF 8-18 CARBON ATOMS AND TETRACARBOXY BUTANE, THE WATER SOLUBLE SALTS OF THE REACTION PRODUCTS WHICH RESULT FROM HEATING ALIPHATIC AMINES OF 8-18 CARBON ATOMS WITH TETRACARBOXY BUTANE DIANHYDRIDE AND THE WATER SOLUBLE SALTS OF THE REACTION PRODUCTS WHICH RESULT FROM HEATING MIXTURES OF ALIPHATIC ALCOHOLS AND ALIPHATIC AMINES OF 8-18 CARBON ATOMS AND TETRACARBOXY BUTANE DIANHYDRIDE.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |