Patent DE592571C successfully refreshed from Google Patents.
US2845327A
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: 1958-07-29
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Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Marion R Lytton
- 👤 George F Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:01
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
IN A METHOD OF PRODUCING SHAPED BODIES OF REGENERATED CELLULOSE CONSISTING SUBSTANTIALLY ENTIRELY OF SKIN THE STEPS WHICH COMPRISE ADDING TO AND INCORPORATING IN VISCOSE FROM ABOUT 0.5% TO ABOUT 6% OF A MODIFIER SELECTED FROM THE GROUP CONSISTING OF CYCLOIMIDINE DERIVATIVES AND MIXTURES OF CYCLOIMIDINE DERIVATIVES, BASED ON THE WEIGHT OF THE CELLULOSE IN THE VISCOSE, THE CYCLOIMIDINE DERIVATIVES CORRESPONDING TO THE GENERAL 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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |