Patent US3126435A successfully refreshed from Google Patents.
US3126435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of regenerated cellulose
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
•
Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:14
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10; Y; Y10; Y10S; Y10S264/00; Y10S264/27; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR PRODUCING REGENERATED CELLULOSE FILAMENTS HAVING A SUBSTANTIALLY ALL SKIN STRUCTURE, COMPRISING EXTRUDING VISCOSE HAVING A BALL FALL VISCOSITY OF BETWEEN ABOUT 44 AND ABOUT 410 SECONDS, THE CELLULOSE OF WHICH HAS AN AVERAGE DEGREE OF POLYMERISATION OF AT LEAST 400 AT A SALT POINT BETWEEN 6 AND 15, INTO AN AQUEOUS COAGULATING BATH CONTAINING SULPHURIC ACID TOGETHER WITH ZINC SULPHATE AND SODIUM SULPHATE IN THE PRESENCE OF BETWEEN 0.5 AND 10 PERCENT BY WEIGHT OF THE WEIGHT OF THE CELLULOSE OF A POLYETHYLENE OXIDE OF AVERAGE MOLECULAR WEIGHT BETWEEN 300 AND 10,000 AT AN EXTRUSION RATIO OF BETWEEN ABOUT 0.4 AND ABOUT 1.1 AND AT A DRAW-OFF SPEED NOT SUBSTANTIALLY GREATER THAN THE DRAW-OFF SPEED DETERMINED BY APPLYING THE BALL FALL VISCOSITY OF THE VISCOSE TO THE CURVE SHOWN IN FIGURE 1.
Claim 2
Dependent Claim
135 words
A PROCESS FOR PRODUCING REGENERATED CELLULOSE FILAMENTS HAVING A SUBSTANTIALLY ALL SKIN STRUCTURE, COMPRISING EXTRUDING VISCOSE HAVING A BALL FALL VISCOSITY OF BETWEEN ABOUT 44 AND ABOUT 410 SECONDS, THE CELLULOSE OF WHICH HAS AN AVERAGE DEGREE OF POLYMERISATION OF AT LEAST 400 AT A SALT POINT BETWEEN 6 AND 15, INTO AN AQUEOUS COAGULATING BATH CONTAINING SULPHURIC ACID TOGETHER WITH ZINC SULPHATE AND SODIUM SULPHATE IN THE PRESENCE OF BETWEEN 0.5 AND 10 PERCENT BY WEIGHT OF THE WEIGHT OF THE CELLULOSE OF A POLYETHYLENE OXIDE OF AVERAGE MOLECULAR WEIGHT BETWEEN 300 AND 10,000 AT AN EXTRUSION RATIO OF BETWEEN ABOUT 0.4 AND ABOUT 1.1 AND AT A DRAW-OFF SPEED NOT SUBSTANTIALLY GREATER THAN THE DRAW-OFF SPEED DETERMINED BY APPLYING THE BALL FALL VISCOSITY OF THE VISCOSE TO THE CURVE SHOWN IN FIGURE 1.
References Cited (Backward Citations)
US2479218A
Cited
US2535044A
Cited
US2674025A
Cited
US2705184A
Cited
US2536094A
Cited
US2592355A
Cited
US2792313A
Cited
US2612679A
Cited
US2696423A
Cited
US2664360A
Cited
US2710861A
Cited
US2732279A
Cited
US2937922A
Cited
US2852333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |