Patent EP0314949A1 successfully refreshed from Google Patents.
US2904446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing viscose rayon
Assignee: Akzo Nobel UK PLC
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Filing: 1957-07-02
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Granted: 1959-09-15
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Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 Schlatter Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:36
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A VISCOSE SPINNING SOLUTION CONTAINING FROM ABOUT 0.25% TO ABOUT 4%, BASED ON THE WEIGHT OF THE CELLULOSE IN THE VISCOSE, OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE COMPOUNDS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
36 words
A VISCOSE SPINNING SOLUTION CONTAINING FROM ABOUT 0.25% TO ABOUT 4%, BASED ON THE WEIGHT OF THE CELLULOSE IN THE VISCOSE, OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE 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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |