US2521748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of regenerated cellulose materials
Assignee: Industrial Rayon Corp
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Filing: 1947-12-26
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Granted: 1950-09-12
•
Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Marcus D Rodgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:16
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F11/00; D01F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR THE MANUFACTURE OF VISCOSE YARNS, STRIPS, FILMS AND THE LIKE WHICH COMPRISES EXTRUDING A VISCOSE SOLUTION INTO AN ACID COAGULATING BATH; WITHDRAWING THE RESULTING MATERIAL FROM SAID BATH; TREATING SAID MATERIAL AT A TEMPERATURE MAINTAINED BETWEEN ABOUT 65*C. AND 100*C. WITH AN AQUEOUS ACID SOLUTION; TREATING
Claim 2
Dependent Claim
49 words
A PROCESS FOR THE MANUFACTURE OF VISCOSE YARNS, STRIPS, FILMS AND THE LIKE WHICH COMPRISES EXTRUDING A VISCOSE SOLUTION INTO AN ACID COAGULATING BATH; WITHDRAWING THE RESULTING MATERIAL FROM SAID BATH; TREATING SAID MATERIAL AT A TEMPERATURE MAINTAINED BETWEEN ABOUT 65*C. AND 100*C. WITH AN AQUEOUS ACID SOLUTION; TREATING
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |