US2900669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irreversibly elongatable cellulose triacetate structure and method of making
Assignee: EIDP Inc
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Filing: 1957-03-27
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Granted: 1959-08-25
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Expires: 1977-03-27
Abstract
No abstract record available.
Inventors
- 👤 Max H Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:25
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS OF PRODUCING IRREVERSIBLY ELONGATABLE SHAPED STRUCTURES WHICH COMPRISES TREATING AN ESSENTIALLY DRAWN SHAPED STRUCTURE OF AN ORGANIC ESTER OF CELLULOSE HAVING A DRY ELONGATION OF AT LEAST 30% BY HEATING SAID STRUCTURE TO A TEMPERATURE ABOVE THE SECOND ORDER TRANSITION TEMPERATURE AND BELOW THE DECOMPOSITION TEMPERATURE OF SAID ORGANIC ESTER OF CELLULOSE FOR A PERIOD OF TIME LESS THAN THAT NECESSARY FOR CRYSTALLIZATION OF SAID STRUCTURE WHEREIN A SHRINKAGE OF AT LEAST 10% OF THE ORIGINAL LENGTH OF SAID STRUCTURE IS OBTAINED.
Claim 2
Dependent Claim
84 words
THE PROCESS OF PRODUCING IRREVERSIBLY ELONGATABLE SHAPED STRUCTURES WHICH COMPRISES TREATING AN ESSENTIALLY DRAWN SHAPED STRUCTURE OF AN ORGANIC ESTER OF CELLULOSE HAVING A DRY ELONGATION OF AT LEAST 30% BY HEATING SAID STRUCTURE TO A TEMPERATURE ABOVE THE SECOND ORDER TRANSITION TEMPERATURE AND BELOW THE DECOMPOSITION TEMPERATURE OF SAID ORGANIC ESTER OF CELLULOSE FOR A PERIOD OF TIME LESS THAN THAT NECESSARY FOR CRYSTALLIZATION OF SAID STRUCTURE WHEREIN A SHRINKAGE OF AT LEAST 10% OF THE ORIGINAL LENGTH OF SAID STRUCTURE IS OBTAINED.
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |