US3025130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet spinning of low density cellulose acetate filaments
Assignee: Celanese Corp
•
Filing: 1959-02-03
•
Granted: 1962-03-13
•
Expires: 1979-02-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin C White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:34
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
62 words
IN THE PRODUCTION OF FIBROUS MATERIAL OF LOW DENSITY. WHEREIN A SOLUTION OF CELLULOSE ACETATE IS EXTRUDED INTO WATER AS A COAGULANT TO FORM A PLURALITY OF FILAMENTS, AND THE FILAMENTS ARE TAKEN UP AS A LOW DENSITY MASS, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE SOLVENT FOR SAID CELLOLOSE ACETATE AQUEOUS ACETONE COMPRISING AT LEAST ABOUT 20% BY WEIGHT OF WATER.
Claim 2
Dependent Claim
62 words
IN THE PRODUCTION OF FIBROUS MATERIAL OF LOW DENSITY. WHEREIN A SOLUTION OF CELLULOSE ACETATE IS EXTRUDED INTO WATER AS A COAGULANT TO FORM A PLURALITY OF FILAMENTS, AND THE FILAMENTS ARE TAKEN UP AS A LOW DENSITY MASS, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE SOLVENT FOR SAID CELLOLOSE ACETATE AQUEOUS ACETONE COMPRISING AT LEAST ABOUT 20% BY WEIGHT OF WATER.
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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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |