US3153687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of viscose rayon
Assignee: Akzona Inc
•
Filing: 1962-01-17
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Granted: 1964-10-20
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Expires: 1982-01-17
Abstract
No abstract record available.
Inventors
- 👤 Eskridge Brewster Blanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:11
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10; Y; Y10; Y10S; Y10S264/00; Y10S264/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR THE PRODUCTION OF HIGH STRENGTH, LOW ELONGATION VISCOSE RAYON YARN AND LIKE PRODUCTS WHICH COMPRISES EXTRUDING A VISCOSE SOLUTION CONTAINING FROM 0.05% TO 0.5% FORMALDEHYDE, BASED ON THE CELLULOSE IN VISCOSE, PREPARED BY ADDING THE FORMALDEHYDE TO THE DISSOLVING LYE FOR THE CELLULOSE XANTHATE, AND FROM 0.3% TO 5.0% OF A MODIFIER BASED ON THE CELLULOSE IN THE VISCOSE, SAID MODIFIER SELECTED FROM THE GROUP CONSISTING OF POLYGLYCOLS, ALKOXYLATED AMINES, AND THEIR QUATERNIZED DERIVATIVES, INTO AN ACID COAGULATING AND REGENERATING BATH, AND COLLECTING THE YARN.
Claim 2
Dependent Claim
88 words
A PROCESS FOR THE PRODUCTION OF HIGH STRENGTH, LOW ELONGATION VISCOSE RAYON YARN AND LIKE PRODUCTS WHICH COMPRISES EXTRUDING A VISCOSE SOLUTION CONTAINING FROM 0.05% TO 0.5% FORMALDEHYDE, BASED ON THE CELLULOSE IN VISCOSE, PREPARED BY ADDING THE FORMALDEHYDE TO THE DISSOLVING LYE FOR THE CELLULOSE XANTHATE, AND FROM 0.3% TO 5.0% OF A MODIFIER BASED ON THE CELLULOSE IN THE VISCOSE, SAID MODIFIER SELECTED FROM THE GROUP CONSISTING OF POLYGLYCOLS, ALKOXYLATED AMINES, AND THEIR QUATERNIZED DERIVATIVES, INTO AN ACID COAGULATING AND REGENERATING BATH, AND COLLECTING THE YARN.
References Cited (Backward Citations)
US2322981A
Cited
US3018158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |