Patent US2879170A successfully refreshed from Google Patents.
US2879170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical composition and process
Assignee: EIDP Inc
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Filing: 1957-10-02
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Granted: 1959-03-24
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Expires: 1977-10-02
Abstract
No abstract record available.
Inventors
- 👤 Miller Ivan Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:12
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
IN THE PROCESS OF PRODUCING A SHAPED STRUCTURE OF REGENERATRED CELLULOSE BY EXTRUDING VISCOSE INTO AN ACIDZINC SULFATE BATH IN THE PRESENCE OF A COAGULATION MODIFIER, THE IMPROVEMENT WHICH COMPRISES ADDING AT LEAST ABOUT 0.02% BY WEIGHT, BASED ON VISCOSE, OF SOLUBLE NICKEL TO THE VISCOSE PRIOR TO EXTRUSION.
Claim 2
Dependent Claim
49 words
IN THE PROCESS OF PRODUCING A SHAPED STRUCTURE OF REGENERATRED CELLULOSE BY EXTRUDING VISCOSE INTO AN ACIDZINC SULFATE BATH IN THE PRESENCE OF A COAGULATION MODIFIER, THE IMPROVEMENT WHICH COMPRISES ADDING AT LEAST ABOUT 0.02% BY WEIGHT, BASED ON VISCOSE, OF SOLUBLE NICKEL TO THE VISCOSE PRIOR TO EXTRUSION.
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |