US2992880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of threads, fibres, filaments and the like from viscose
Assignee: Akzo Nobel UK PLC
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Filing: 1956-06-26
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Granted: 1961-07-18
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Expires: 1976-06-26
Abstract
No abstract record available.
Inventors
- 👤 Toms Bryan Atkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:37
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F11/00; D01F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE PRODUCTION OF THREADS OF CELLULOSE DERIVATIVES FROM VISCOSE WHICH COMPRISES EXTRUDING VISCOSE OF GAMMA VALUE 15 TO 45 INTO AN AQUEOUS COAGULATING SOLUTION OF SODIUM BICARBONATE OF GREATER THAN 50% SATURATION, AT 35* C. TO 45* C. TO FORM WATER SOLUBLE THREADS OF SODIUM CELLULOSE XANTHATE, REMOVING THE WATER SOLUBLE THREADS FROM THE COAGULATING SOLUTION AND REACTING THE THREADS WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM MONOCHLOROACETATE AND METHYL IODIDE.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE PRODUCTION OF THREADS OF CELLULOSE DERIVATIVES FROM VISCOSE WHICH COMPRISES EXTRUDING VISCOSE OF GAMMA VALUE 15 TO 45 INTO AN AQUEOUS COAGULATING SOLUTION OF SODIUM BICARBONATE OF GREATER THAN 50% SATURATION, AT 35* C. TO 45* C. TO FORM WATER SOLUBLE THREADS OF SODIUM CELLULOSE XANTHATE, REMOVING THE WATER SOLUBLE THREADS FROM THE COAGULATING SOLUTION AND REACTING THE THREADS WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM MONOCHLOROACETATE AND METHYL IODIDE.
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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |