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US3173752A
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Method for impregnating regenerated cellulose filament tows and making staple fibers therefrom
Assignee: Akzo Nobel UK PLC
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Filing: 1961-10-05
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Granted: 1965-03-16
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Expires: 1981-10-05
Abstract
No abstract record available.
Inventors
- 👤 Neal P Rowell
- 👤 Wharton John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:55
CPC Classifications
D; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0472; D01F; D01F11/00; D01F11/02; Y; Y10; Y10S; Y10S8/00; Y10S8/02; Y10S8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A METHOD FOR MAKING CROSS-LINKED REGENERATED CELLULOSE STAPLE FIBER THE IMPROVEMENT WHICH COMPRISES IMPREGNATING SAID FIBER WHILE IN THE FORM OF A TOW COMPRISING A PLURALITY OF SUBSTANTIALLY PARALLEL FILAMENTS HAVING A TOTAL DENIER OF BETWEEN ABOUT 3,000 AND ABOUT 1,500,000 AND WHILE STILL IN THE AQUEOUS GEL STATE AFTER SPINNING, WITH AN AQUEOUS LIQUID CONTAINING AN AGENT CAPABLE OF CHEMICALLY CROSS-LINKING CELLULOSE UPON DRYING AND CURING, SQUEEZING THE TOW TO REDUCE ITS LIQUID CONTENT TO BELOW THE WATER IMBIBITION OF THE GEL FILAMENTS, DRYING THE TOW, CURING THE TOW IN THE SUBSTANTIAL ABSENCE OF TENSION, AND THEN CUTTING UP THE TOW TO FORM STAPLE.
Claim 2
Dependent Claim
106 words
IN A METHOD FOR MAKING CROSS-LINKED REGENERATED CELLULOSE STAPLE FIBER THE IMPROVEMENT WHICH COMPRISES IMPREGNATING SAID FIBER WHILE IN THE FORM OF A TOW COMPRISING A PLURALITY OF SUBSTANTIALLY PARALLEL FILAMENTS HAVING A TOTAL DENIER OF BETWEEN ABOUT 3,000 AND ABOUT 1,500,000 AND WHILE STILL IN THE AQUEOUS GEL STATE AFTER SPINNING, WITH AN AQUEOUS LIQUID CONTAINING AN AGENT CAPABLE OF CHEMICALLY CROSS-LINKING CELLULOSE UPON DRYING AND CURING, SQUEEZING THE TOW TO REDUCE ITS LIQUID CONTENT TO BELOW THE WATER IMBIBITION OF THE GEL FILAMENTS, DRYING THE TOW, CURING THE TOW IN THE SUBSTANTIAL ABSENCE OF TENSION, AND THEN CUTTING UP THE TOW TO FORM STAPLE.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |