Patent US3418405A successfully refreshed from Google Patents.
US3418405A
Expired / Lapsed
US
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Method of manufacturing flat viscose fibers
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1963-09-04
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Granted: 1968-12-24
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Expires: 1983-09-04
Abstract
No abstract record available.
Inventors
- 👤 Kajitani Yoichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:05
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/02; D21H13/08; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF MANUFACTURING TUBULAR FLAT VISCOSE FIBER WHICH COMPRISES EXTRUDING THE VISCOSE CONTAINING 2 TO 50% BY WEIGHT BASED ON THE CELLULOSE IN THE VISCOSE OF A WATER SWELLING HIGH MOLECULAR SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL ALCOHOL DERIVATIVES AND CELLULOSE DERIVATIVES AND 0.05 TO 2% BY WEIGHT BASED ON THE VISCOSE OF A VISCOSE MODIFIER SELECTED FROM THE GROUP CONSISTING OF POLYOXYALKYLENE DERIVATIVES, ALIPHATIC AMINES, QUATERNARY AMMONIUM SALTS, DITHIOCARBAMATES AND HYDROXYPOLYAMINES AND HAVING A LARGE NUMBER OF FINE BUBBLES DISPERSED THEREIN, INTO A COAGULATION BATH CONTAINING SULFURIC ACID AND SULFATE.
Claim 2
Independent Claim
96 words
A METHOD OF MANUFACTURING TUBULAR FLAT VISCOSE FIBER WHICH COMPRISES EXTRUDING THE VISCOSE CONTAINING 2 TO 50% BY WEIGHT BASED ON THE CELLULOSE IN THE VISCOSE OF A WATER SWELLING HIGH MOLECULAR SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL ALCOHOL DERIVATIVES AND CELLULOSE DERIVATIVES AND 0.05 TO 2% BY WEIGHT BASED ON THE VISCOSE OF A VISCOSE MODIFIER SELECTED FROM THE GROUP CONSISTING OF POLYOXYALKYLENE DERIVATIVES, ALIPHATIC AMINES, QUATERNARY AMMONIUM SALTS, DITHIOCARBAMATES AND HYDROXYPOLYAMINES AND HAVING A LARGE NUMBER OF FINE BUBBLES DISPERSED THEREIN, INTO A COAGULATION BATH CONTAINING SULFURIC ACID AND SULFATE.
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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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |