US2570201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymer spinning
Assignee: Industrial Rayon Corp
•
Filing: 1950-04-01
•
Granted: 1951-10-09
•
Expires: 1970-04-01
Abstract
No abstract record available.
Inventors
- 👤 Herman A Bruson
- 👤 Gilman S Hooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:43
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
THE METHOD OF FORMING A SHAPED ARTICLE WHICH COMPRISES EXTRUDING AN ACRYLONITRILE POLYMER SPINNING SOLUTION CONTAINING ETHYLENE CARBONATE AS A SOLVENT INTO A LIQUID COAGULATING MEDIUM CONTAINING, EXCLUSIVE OF ETHYLENE CARBONATE, AT LEAST ABOUT 75% BY WEIGHT DIPROPYLENE GLYCOL; SAID POLYMER CONTAINING IN THE POLYMER MOLECULE A MAJOR PORTION OF ACRYLONITRILE.
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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |