Patent US3046083A successfully refreshed from Google Patents.
US3046083A
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Method for producing crimped rayon staple fiber
Assignee: Akzo Nobel UK PLC
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Filing: 1960-06-06
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Granted: 1962-07-24
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur I Bates
- 👤 Joseph H Anderer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:27
CPC Classifications
D; D01; D01D; D01D10/00; D01D10/06; D01D5/00; D01D5/06; D01D5/22; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A METHOD OF PRODUCING IMPROVED REGENERATED CELLULOSE FIBERS WHICH COMPRISES EXTRUDING VISCOSE, HAVING A COMMON SALT TEST FIGURE OF FROM 3.5 TO 5 AND CONTAINING FROM 7 TO 12% BY WEIGHT OF CELLULOSE, FROM 4.5 TO 7.5% BY WEIGHT OF SODIUM HYDROXIDE, AND CARBON DISULFIDE IN AN AMOUNT SUFFICIENT TO PROVIDE FROM 1.5 TO LESS THAN 2.4% SULFUR IN THE VISCOSE, INTO A SPINNING BATH CONTAINING FROM 5 TO 6% BY WEIGHT OF SULFURIC ACID, FROM 0.1 TO 0.4% BY WEIGHT OF ZINC SULFATE AND FROM 17 TO 21% BY WEIGHT OF SODIUM SULFATE, AND HAVING A TEMPERATURE OF FROM 40 TO 60*C.; APPLYING TENSION IN AIR TO THE FORMED FILAMENT TO OBTAIN A STRETCH OF FROM ABOUT 5 TO LESS THAN 20% OF THE ORIGINAL LENGTH OF THE FILAMENT, AND THEN WASHING THE FILAMENT IN A RELAXED STATE IN AN AQUEOUS MEDIUM HAVING A TEMPERATURE RANGING FROM ABOUT 60 TO 100*C.
Claim 2
Independent Claim
152 words
A METHOD OF PRODUCING IMPROVED REGENERATED CELLULOSE FIBERS WHICH COMPRISES EXTRUDING VISCOSE, HAVING A COMMON SALT TEST FIGURE OF FROM 3.5 TO 5 AND CONTAINING FROM 7 TO 12% BY WEIGHT OF CELLULOSE, FROM 4.5 TO 7.5% BY WEIGHT OF SODIUM HYDROXIDE, AND CARBON DISULFIDE IN AN AMOUNT SUFFICIENT TO PROVIDE FROM 1.5 TO LESS THAN 2.4% SULFUR IN THE VISCOSE, INTO A SPINNING BATH CONTAINING FROM 5 TO 6% BY WEIGHT OF SULFURIC ACID, FROM 0.1 TO 0.4% BY WEIGHT OF ZINC SULFATE AND FROM 17 TO 21% BY WEIGHT OF SODIUM SULFATE, AND HAVING A TEMPERATURE OF FROM 40 TO 60*C.; APPLYING TENSION IN AIR TO THE FORMED FILAMENT TO OBTAIN A STRETCH OF FROM ABOUT 5 TO LESS THAN 20% OF THE ORIGINAL LENGTH OF THE FILAMENT, AND THEN WASHING THE FILAMENT IN A RELAXED STATE IN AN AQUEOUS MEDIUM HAVING A TEMPERATURE RANGING FROM ABOUT 60 TO 100*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |