US2882122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing crimpable regenerated cellulose filaments
Assignee: EIDP Inc
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Filing: 1956-01-05
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Granted: 1959-04-14
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Expires: 1976-01-05
Abstract
No abstract record available.
Inventors
- 👤 John R Emery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR PRODUCING CRIMPABLE REGENERATED CELLULOSE FILAMENTS OF EXCELLENT FLEX LIFE COMPRISING EXTRUDING THROUGH THE ORIFICES OF A SPINNERET A VISCOSE SOLUTION HAVING AN ALKALI CONTENT OF 5-7%, A CELLULOSE CONTENT OF 6-7.5%, AND A SALT INDEX OF 3-6 INT A COAGULATING AND REGENERATING BOTH HAVING A SULFURIC ACID CONTENT OF 6.59.5%, A SODIUM SULFATE CONTENT OF 15-30%, A ZINC SULFATE CONTENT OF 1.0-2.5% AND A TEMPERATURE OF 40-60*C. TO FORM FILAMENTS, IMPOSING A TENSION OF LESS THAN 0.3 GRAM PER DENIER ON SAID FILAMENTS IN THE COAGULATING AND REGENERATING BATH; WASHING SAID FILAMENTS WITHOUT APPLYING ANY SUBSTANTIAL STRETCH TO THE FILAMENTS; STRETCHING SAID FILAMENTS 7-20% IN AN AQUEOUS LUBRICATING SOLUTION AND DRYING SAID FILAMENTS WHILE SUBSTANTIALLY RETAINING THE AFROEMENTIONED STRETCH.
Claim 2
Dependent Claim
122 words
A PROCESS FOR PRODUCING CRIMPABLE REGENERATED CELLULOSE FILAMENTS OF EXCELLENT FLEX LIFE COMPRISING EXTRUDING THROUGH THE ORIFICES OF A SPINNERET A VISCOSE SOLUTION HAVING AN ALKALI CONTENT OF 5-7%, A CELLULOSE CONTENT OF 6-7.5%, AND A SALT INDEX OF 3-6 INT A COAGULATING AND REGENERATING BOTH HAVING A SULFURIC ACID CONTENT OF 6.59.5%, A SODIUM SULFATE CONTENT OF 15-30%, A ZINC SULFATE CONTENT OF 1.0-2.5% AND A TEMPERATURE OF 40-60*C. TO FORM FILAMENTS, IMPOSING A TENSION OF LESS THAN 0.3 GRAM PER DENIER ON SAID FILAMENTS IN THE COAGULATING AND REGENERATING BATH; WASHING SAID FILAMENTS WITHOUT APPLYING ANY SUBSTANTIAL STRETCH TO THE FILAMENTS; STRETCHING SAID FILAMENTS 7-20% IN AN AQUEOUS LUBRICATING SOLUTION AND DRYING SAID FILAMENTS WHILE SUBSTANTIALLY RETAINING THE AFROEMENTIONED STRETCH.
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) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |