Patent US2937922A successfully refreshed from Google Patents.
US2937922A
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Viscose process
Assignee: Rayonier Inc
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Filing: 1954-03-24
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Granted: 1960-05-24
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Expires: 1974-03-24
Abstract
No abstract record available.
Inventors
- 👤 Mitchell Reid Logan
- 👤 Berry James Wesley
- 👤 Wadman William Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:46
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN THE VISCOSE PROCESS THE IMPROVEMENT WHICH COMPRISES FORMING A VISCOSE SOLUTION CONTAINING ABOUT 5% EACH OF THE CELLULOSE AND SODIUM HYDROXIDE, SAID CELLULOSE HAVING A DEGREE OF POLYMERIZATION OF ABOUT 800, SPINNING THE VISCOSE INTO AN ACID SPIN BATH CONTAINING FROM ABOUT 0.1% TO 1.0% OF DIMETHYLAMINE, AND STRETCHING THE FILAMENTS IN EXCESS OF 70% WHILE IN CONTACT WITH ACID SPIN BATH PRODUCING ALL-SKIN FILAMENTS.
Claim 2
Dependent Claim
66 words
IN THE VISCOSE PROCESS THE IMPROVEMENT WHICH COMPRISES FORMING A VISCOSE SOLUTION CONTAINING ABOUT 5% EACH OF THE CELLULOSE AND SODIUM HYDROXIDE, SAID CELLULOSE HAVING A DEGREE OF POLYMERIZATION OF ABOUT 800, SPINNING THE VISCOSE INTO AN ACID SPIN BATH CONTAINING FROM ABOUT 0.1% TO 1.0% OF DIMETHYLAMINE, AND STRETCHING THE FILAMENTS IN EXCESS OF 70% WHILE IN CONTACT WITH ACID SPIN BATH PRODUCING ALL-SKIN FILAMENTS.
References Cited (Backward Citations)
US2225604A
Cited
US2442331A
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US2297746A
Cited
US2535045A
Cited
US2535044A
Cited
US2586796A
Cited
US2607955A
Cited
US2592355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |