Patent US2987409A successfully refreshed from Google Patents.
US2987409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film forming compositions
Assignee: Eastman Kodak Co
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Filing: 1959-04-29
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Granted: 1961-06-06
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Expires: 1979-04-29
Abstract
No abstract record available.
Inventors
- 👤 Valls Paule
- 👤 Etienne Yves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
A FILM-FORMING COMPOSITION FOR CASTING FILMS HAVING IMPROVED DIMENSIONAL STABILITY OBTAINED BY COATING ON A HIGHLY POLISHED CASTING SURFACE, CONSISTING ESSENTIALLY OF CELLULOSE TRIACETATE HAVING AN ACETYL CONTENT OF 42.544% AND AN ORGANIC SOLVENT MIXTURE OF 65-95% BY WEIGHT METHYLENE CHLORIDE AND 25-5% LOWER ALCOHOL AND CONTAINING 5-10% BY WEIGHT OF THE SOLVENT MIXTURE OF A COAGULATING AGENT SELECTED FROM THE CLASS CONSISTING OF TRIMETHYLCYCLOHEXANONE AND METADIOXANE HAVING THE FOLLOWING FORMULA:
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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |