US2966428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat stable saponified cellulose ester filamentary material and process of making
Assignee: Celanese Corp
•
Filing: 1956-04-05
•
Granted: 1960-12-27
•
Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert W Singleton
- 👤 William B Horback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:13
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/192; D06M13/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A SUBSTANTIALLY COMPLETELY SAPONIFIED STRETCHED CELLULOSE ESTER FILAMENTARY MATERIAL CONTAINING AN ALKALINE EARTH METAL COMPOUND IN SOLD STATE, THE AMOUNT OF SAID ALKALINE EARTH METAL COMPOUND BEING ABOVE ABOUT 0.5 GRAM MILLIMOLE OF METAL PER 100 GRAMS OF SAID FILAMENTARY MATERIAL, AND BEING SUFFICIENT TO IMPROVE THE HEAT STABILITY OF SAID FILAMENTARY MATERIAL.
Claim 2
Dependent Claim
53 words
A SUBSTANTIALLY COMPLETELY SAPONIFIED STRETCHED CELLULOSE ESTER FILAMENTARY MATERIAL CONTAINING AN ALKALINE EARTH METAL COMPOUND IN SOLD STATE, THE AMOUNT OF SAID ALKALINE EARTH METAL COMPOUND BEING ABOVE ABOUT 0.5 GRAM MILLIMOLE OF METAL PER 100 GRAMS OF SAID FILAMENTARY MATERIAL, AND BEING SUFFICIENT TO IMPROVE THE HEAT STABILITY OF SAID FILAMENTARY MATERIAL.
References Cited (Backward Citations)
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Cited
US2060047A
Cited
US2038723A
Cited
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Cited
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Cited
US2687363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |