US2607704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose acetate solution and a film formed therefrom
Assignee: Eastman Kodak Co
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Filing: 1949-05-24
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Granted: 1952-08-19
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Expires: 1969-05-24
Abstract
No abstract record available.
Inventors
- 👤 Charles R Fordyce
- 👤 Bruce E Gramkee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K5/00; C08K5/04; C08K5/05; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/12; C09; C09D; C09D101/00; C09D101/08; C09D101/10; C09D101/12; C08J2301/00; C08J2301/08; C08J2301/10; C08J2301/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A CELLULOSE ACETATE SOLUTION CAPABLE OF BEING RAPIDLY FORMED INTO A RELATIVELY NONINFLAMMABLE FILM BASE COMPRISED ESSENTIALLY OF CELLULOSE ACETATE HAVING AN ACETYL CONTENT BETWEEN 42.5% AND 44% SAID CELLULOSE ACETATE BEING DISSOLVED IN A SOLVENT COMPOSED OF METHYLENE CHLORIDE 65 TO 90% METHYL ALCOHOL 25 TO 5% AND CYCLOHEXANE 5 TO 10%
Claim 2
Dependent Claim
53 words
A CELLULOSE ACETATE SOLUTION CAPABLE OF BEING RAPIDLY FORMED INTO A RELATIVELY NONINFLAMMABLE FILM BASE COMPRISED ESSENTIALLY OF CELLULOSE ACETATE HAVING AN ACETYL CONTENT BETWEEN 42.5% AND 44% SAID CELLULOSE ACETATE BEING DISSOLVED IN A SOLVENT COMPOSED OF METHYLENE CHLORIDE 65 TO 90% METHYL ALCOHOL 25 TO 5% AND CYCLOHEXANE 5 TO 10%
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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |