US2675360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose acetate fibers with improved dyeing properties
Assignee: Eastman Kodak Co
•
Filing: 1952-04-01
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Granted: 1954-04-13
•
Expires: 1972-04-01
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:44
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F2/00; D01F2/24; D01F2/28; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
CELLULOSE ESTER FIBERS HAVING WOOL DYEING PROPERTIES ESSENTIALLY CONSISTING OF A LOWER FATTY ACID ESTER OF CELLULOSE HAVING 1 TO 4 CARBON ATOMS AND APPROXIMATELY 10 TO 40% BY WEIGHT OF A LINEAR POLYURETHANE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
38 words
CELLULOSE ESTER FIBERS HAVING WOOL DYEING PROPERTIES ESSENTIALLY CONSISTING OF A LOWER FATTY ACID ESTER OF CELLULOSE HAVING 1 TO 4 CARBON ATOMS AND APPROXIMATELY 10 TO 40% BY WEIGHT OF A LINEAR POLYURETHANE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2356079A
Cited
GB615884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |