US2696423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscose modifiers
Assignee: EIDP Inc
•
Filing: 1951-05-29
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Granted: 1954-12-07
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Expires: 1971-05-29
Abstract
No abstract record available.
Inventors
- 👤 Dietrich Melvin Adam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:33
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR THE PRODUCTION OF REGENERATED CELLULOSE ARTICLES WHICH COMPRISES ADDING TO VISCOSE A SOLUBLE SALT OF AN N-SUBSTITUTED DITHIOCARBAMIC ACID AND EXTRUDING THE RESULTANT VISCOSE INTO AN ACID COAGULATING BATH CONTAINING ABOUT 1% TO ABOUT 15% ZINC SULFATE.
Claim 2
Dependent Claim
40 words
A PROCESS FOR THE PRODUCTION OF REGENERATED CELLULOSE ARTICLES WHICH COMPRISES ADDING TO VISCOSE A SOLUBLE SALT OF AN N-SUBSTITUTED DITHIOCARBAMIC ACID AND EXTRUDING THE RESULTANT VISCOSE INTO AN ACID COAGULATING BATH CONTAINING ABOUT 1% TO ABOUT 15% ZINC SULFATE.
References Cited (Backward Citations)
US2535044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |