Patent US4115122A successfully refreshed from Google Patents.
Patent US3081145A successfully refreshed from Google Patents.
US3081145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing fibers and threads from cellulose triacetate
Assignee: Celanese Corp
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Filing: 1961-03-08
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Granted: 1963-03-12
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Expires: 1981-03-08
Abstract
No abstract record available.
Inventors
- 👤 Ernst Paul
- 👤 Fischer Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:49
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE PROCESS WHICH COMPRISES WET SPINNING CELLULOSE TRIACETATE DISSOLVED IN METHYLENE CHLORIDE INTO A COAGULANT COMPRISING ABOUT 35 TO 75% BY WEIGHT OF A WATER-SOLUBLE MEMBER SELECTED FROM THE GROUP CONSISTING OF GLYCOLS CONTAINING ABOUT 3 TO 6 CARBONS ATOMS, POLYGLYCOLS, ETHERS THEREOF AND ESTERS THEREOF, ABOUT 15 TO 65% BY WEIGHT OF METHYLENE CHLORIDE AND WATER TO PROACETATE WHICH COMPRISES EXTRUDING A SOLUTION OF CELLULOSE DUE CELLULOSE TRIACETATE CONTINUOUS FILAMENTARY MATERIAL.
Claim 2
Dependent Claim
72 words
THE PROCESS WHICH COMPRISES WET SPINNING CELLULOSE TRIACETATE DISSOLVED IN METHYLENE CHLORIDE INTO A COAGULANT COMPRISING ABOUT 35 TO 75% BY WEIGHT OF A WATER-SOLUBLE MEMBER SELECTED FROM THE GROUP CONSISTING OF GLYCOLS CONTAINING ABOUT 3 TO 6 CARBONS ATOMS, POLYGLYCOLS, ETHERS THEREOF AND ESTERS THEREOF, ABOUT 15 TO 65% BY WEIGHT OF METHYLENE CHLORIDE AND WATER TO PROACETATE WHICH COMPRISES EXTRUDING A SOLUTION OF CELLULOSE DUE CELLULOSE TRIACETATE CONTINUOUS FILAMENTARY MATERIAL.
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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |