US2853360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscose spinning process
Assignee: Akzo Nobel UK PLC
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Filing: 1954-11-03
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Granted: 1958-09-23
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Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Byron A Thumm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A METHOD OF PRODUCING SHAPED BODIES OF REGENERATED CELLULOSE CONSISTING SUBSTANTIALLY ENTIRELY OF SKIN, THE WHICH COMPRISES EXTRUDING A VIKSCOSE CONTAINING FROM ABOUT 0.25% TO ABOUT 4%, BASED ON THE WEIGHT OF THE CELLULOSE IN THE VISCOSE, OF A WATER-SOLUBLE MORPHOLINE DERIVATIVE INTO AN AQUEOUS SPINNING BATH CONTAINING FROM ABOUT 10% TO 25% SODIUM SULFATE, FROM ABOUT 3% TO 15% ZINC SULFATE, AT LEAST ABOUT 0.01% OF A WATER-SOLLUBLE MOROPHOLINE DERIVATIVE AND SULFURIC ACID, THE SULFURIC ACID CONTENT OF THE SPINNING BATH EXCEEDING THE SLUBBING POINT BUT NOT EVCEEDING ABOUT 8.5%, THE MORPHOLINE DERIVATIVE BEING SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE COMPOUNDS AND MIXTURES OF WATER-SOLUBLE COMPOUNDS REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
113 words
IN A METHOD OF PRODUCING SHAPED BODIES OF REGENERATED CELLULOSE CONSISTING SUBSTANTIALLY ENTIRELY OF SKIN, THE WHICH COMPRISES EXTRUDING A VIKSCOSE CONTAINING FROM ABOUT 0.25% TO ABOUT 4%, BASED ON THE WEIGHT OF THE CELLULOSE IN THE VISCOSE, OF A WATER-SOLUBLE MORPHOLINE DERIVATIVE INTO AN AQUEOUS SPINNING BATH CONTAINING FROM ABOUT 10% TO 25% SODIUM SULFATE, FROM ABOUT 3% TO 15% ZINC SULFATE, AT LEAST ABOUT 0.01% OF A WATER-SOLLUBLE MOROPHOLINE DERIVATIVE AND SULFURIC ACID, THE SULFURIC ACID CONTENT OF THE SPINNING BATH EXCEEDING THE SLUBBING POINT BUT NOT EVCEEDING ABOUT 8.5%, THE MORPHOLINE DERIVATIVE BEING SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE COMPOUNDS AND MIXTURES OF WATER-SOLUBLE COMPOUNDS REPRESENTED BY THE FORMULA
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |