US2776219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelatin coating solution for film support
Assignee: Eastman Kodak Co
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Filing: 1954-09-02
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Granted: 1957-01-01
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Expires: 1974-09-02
Abstract
No abstract record available.
Inventors
- 👤 Fred W Hoyt
- 👤 David L Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A SOLUTION FOR COATING FILM SUPPORT CONTAINING BY WEIGH 0.5 TO 1.75% GELATIN AND APPROXIMATELY .60% BY WEIGHT OF CELLULOSE NITRATE IN AN AQUEOUS SOLVENT MIXTURE OF APPROXIMATELY 60% BY WEIGHT OF ACETONE, APPROXIMATELY 5% BY WEIGHT OF ETHYLENE CHLORIDE, APPROXIMATELY .02% BY WEIGHT OF CHROMIC CHLORIDE AND 25 TO 30% BY WEIGHT OF METHANOL AND 0.05% TO 0.3% BY WEIGHT OF A PERHALOGENATED FATTY ACID SELECTED FROM THE GROUP CONSISTING OF TRIFLUOROACETIC ACID, PERFLUOROCAPRYLIC ACID, AND TRICHLOROACETIC ACID.
Claim 2
Dependent Claim
79 words
A SOLUTION FOR COATING FILM SUPPORT CONTAINING BY WEIGH 0.5 TO 1.75% GELATIN AND APPROXIMATELY .60% BY WEIGHT OF CELLULOSE NITRATE IN AN AQUEOUS SOLVENT MIXTURE OF APPROXIMATELY 60% BY WEIGHT OF ACETONE, APPROXIMATELY 5% BY WEIGHT OF ETHYLENE CHLORIDE, APPROXIMATELY .02% BY WEIGHT OF CHROMIC CHLORIDE AND 25 TO 30% BY WEIGHT OF METHANOL AND 0.05% TO 0.3% BY WEIGHT OF A PERHALOGENATED FATTY ACID SELECTED FROM THE GROUP CONSISTING OF TRIFLUOROACETIC ACID, PERFLUOROCAPRYLIC ACID, AND TRICHLOROACETIC ACID.
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) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |