Patent US2535045A successfully refreshed from Google Patents.
US2535045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning of viscose
Assignee: EIDP Inc
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Filing: 1947-04-26
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Granted: 1950-12-26
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Expires: 1967-04-26
Abstract
No abstract record available.
Inventors
- 👤 Cox Norman Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:40
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD OF PRODUCING REGENERATED CELLULOSIC STRUCTURES WHICH COMPRISES THE STEP OF SPINNING VISCOSE INTO AN AQUEOUS 4 TO 12% SULFURIC ACID SPINNING BATH CONTAINING AT LEAST 2% OF ZINC SULFATE AND AT LEAST 0.2% OF A BATH-SOLUBLE MONOAMINE WHICH CONTAINS FROM 4 TO 10 CARBON ATOMS AND WHICH CONTAINS NO RADICAL HAVING MORE THAN 6 CARBON ATOMS.
Claim 2
Independent Claim
58 words
A METHOD OF PRODUCING REGENERATED CELLULOSIC STRUCTURES WHICH COMPRISES THE STEP OF SPINNING VISCOSE INTO AN AQUEOUS 4 TO 12% SULFURIC ACID SPINNING BATH CONTAINING AT LEAST 2% OF ZINC SULFATE AND AT LEAST 0.2% OF A BATH-SOLUBLE MONOAMINE WHICH CONTAINS FROM 4 TO 10 CARBON ATOMS AND WHICH CONTAINS NO RADICAL HAVING MORE THAN 6 CARBON ATOMS.
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) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |