US2743994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing shaped articles from polymeric materials
Assignee: Solutia Inc
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Filing: 1953-09-24
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Granted: 1956-05-01
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Expires: 1973-09-24
Abstract
No abstract record available.
Inventors
- 👤 David W Chaney
- 👤 Rodger L Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:32
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; D01F6/44; D01F6/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR PRODUCING SHAPED ARTICLES FROM POLYMERIC MATERIALS COMPRISING, DISSOLVING A POLYMER CONTAINING AT LEAST 80% BY WEIGHT OF ACRYLONITRILE AND UP TO 20% OF A MONO-OLEFINE MONOMER COPOLYMERIZABLE THEREWITH IN A SOLVENT THEREFOR, EXTRUDING THE SOLUTION INTO A COAGULATING MEDIUM, STRETCHING THE ARTICLE SO PRODUCED TO ORIENT THE POLYMER MOLECULES AT A TEMPERATURE NOT EXCEEDING 100* C. AND FOR A PERIOD OF TIME LESS THAN 15 SECONDS, RELAXING THE ARTICLE, AND CRYSTALLIZING THE ARTICLE IN A RELAXED STATE BY SUBJECTING THE ARTICLE TO A TEMPERATURE OF AT LEAST 100* C. FOR A PERIOD OF AT LEAST 15 SECONDS.
Claim 2
Dependent Claim
100 words
A PROCESS FOR PRODUCING SHAPED ARTICLES FROM POLYMERIC MATERIALS COMPRISING, DISSOLVING A POLYMER CONTAINING AT LEAST 80% BY WEIGHT OF ACRYLONITRILE AND UP TO 20% OF A MONO-OLEFINE MONOMER COPOLYMERIZABLE THEREWITH IN A SOLVENT THEREFOR, EXTRUDING THE SOLUTION INTO A COAGULATING MEDIUM, STRETCHING THE ARTICLE SO PRODUCED TO ORIENT THE POLYMER MOLECULES AT A TEMPERATURE NOT EXCEEDING 100* C. AND FOR A PERIOD OF TIME LESS THAN 15 SECONDS, RELAXING THE ARTICLE, AND CRYSTALLIZING THE ARTICLE IN A RELAXED STATE BY SUBJECTING THE ARTICLE TO A TEMPERATURE OF AT LEAST 100* C. FOR A PERIOD OF AT LEAST 15 SECONDS.
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |