Patent US2999004A successfully refreshed from Google Patents.
US2999004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating filamentary material
Assignee: Celanese Corp
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Filing: 1957-10-21
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Granted: 1961-09-05
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Expires: 1977-10-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Stewart W Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:17
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/06; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
PROCESS FOR THE PRODUCTION OF FILAMENTARY CELLULOSE TRIACETATE WHICH COMPRISES EXTRUDING A SOLUTION OF CELLULOSE TRIACETATE IN A SOLVENT THEREFOR COMPRISING METHYLENE CHLORIDE INTO A SPIN BATH COMPRISING ABOUT 25 TO 65% OF METHYLENE CHLORIDE AND A LOWER ALIPHATIC ALCOHOL TO FORM FILAMENTARY CELLULOSE TRIACETATE, AND TREATING SAID FILAMENTARY CELLULOSE TRIACETATE WITH A LIQUID ORGANIC NONSOLVENT FOR CELLULOSE TRIACETATE WHICH IS MISCIBLE WITH METHYLENE CHLORIDE AND BOILS BELOW ABOUT 150*C.
Claim 2
Dependent Claim
70 words
PROCESS FOR THE PRODUCTION OF FILAMENTARY CELLULOSE TRIACETATE WHICH COMPRISES EXTRUDING A SOLUTION OF CELLULOSE TRIACETATE IN A SOLVENT THEREFOR COMPRISING METHYLENE CHLORIDE INTO A SPIN BATH COMPRISING ABOUT 25 TO 65% OF METHYLENE CHLORIDE AND A LOWER ALIPHATIC ALCOHOL TO FORM FILAMENTARY CELLULOSE TRIACETATE, AND TREATING SAID FILAMENTARY CELLULOSE TRIACETATE WITH A LIQUID ORGANIC NONSOLVENT FOR CELLULOSE TRIACETATE WHICH IS MISCIBLE WITH METHYLENE CHLORIDE AND BOILS BELOW ABOUT 150*C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |