Patent US2852334A successfully refreshed from Google Patents.
US2852334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing viscose rayon
Assignee: Akzo Nobel UK PLC
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Filing: 1954-11-03
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Granted: 1958-09-16
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Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Hollihan
- 👤 John A Howsmon
- 👤 Wayne A Sisson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:50
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN A METHOD OF PRODUCING SHAPED BODIES OF REGENERATED CELLULOSE CONSISTING SUBSTANTIALLY ENTIRELY OF SKIN, THE STEPS WHICH INCLUDE EXTRUDING A VISCOSE CONTAINING FROM ABOUT 4% TO ABOUT 8% CELLULOSE, FROM ABOUT 4% TO ABOUT 8% CASTIC SODA, FROM ABOUT 30% TO ABOUT 50% CARBON DISULFIDE BASED ON THE WEIGHT OF THE CELLULOSE AND FROM ABOUT 0.2% TO 4%, BASED ON THE WEIGHT OF THE CELLULOSE, OF AN ALKALI-SOLUBLE SUBSTANCE SELECTED FROM THE COMPOUNDS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
78 words
IN A METHOD OF PRODUCING SHAPED BODIES OF REGENERATED CELLULOSE CONSISTING SUBSTANTIALLY ENTIRELY OF SKIN, THE STEPS WHICH INCLUDE EXTRUDING A VISCOSE CONTAINING FROM ABOUT 4% TO ABOUT 8% CELLULOSE, FROM ABOUT 4% TO ABOUT 8% CASTIC SODA, FROM ABOUT 30% TO ABOUT 50% CARBON DISULFIDE BASED ON THE WEIGHT OF THE CELLULOSE AND FROM ABOUT 0.2% TO 4%, BASED ON THE WEIGHT OF THE CELLULOSE, OF AN ALKALI-SOLUBLE SUBSTANCE SELECTED FROM THE COMPOUNDS CORRESPONDING TO 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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |