US2858290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation and use of acrylonitrile polymer dissolved in dimethyl sulfoxide
Assignee: Dow Chemical Co
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Filing: 1956-04-23
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Granted: 1958-10-28
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Expires: 1976-04-23
Abstract
No abstract record available.
Inventors
- 👤 Clyde W Davis
- 👤 Forrest A Ehlers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:52
CPC Classifications
C; C08; C08F; C08F271/00; C08F2/00; C08F2/36; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F291/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
METHOD FOR PREPARING SPINNABLE, DISSOLVED FIBERFORMING SYSTEMS WHICH COMPRISES DISSOLVING A POLYMERIZABLE MONOETHYLENICALLY UNSATURATED, ACRYLONITRILECONTAINING MONOMERIC MATERIAL IN DIMETHYL SULFOXIDE, SAID MONOETHYLENICALLY UNSATURATED MONOMERIC MATERIAL COMPRISING ACRYLONITRILE WHICH IS EMPLOYED IN A SUFFICIENT QUANTITY TO OBTAIN A RESULTING DISSOLVED POLYMERIC PRODUCT WHICH CONTAINS IN THE POLYMER MOLECULE AT LEAST ABOUT 80 PERCENT BY WEIGHT OF ACRYLONITRILE, ANY BALANCE OF SAID MONOMERIC MATERIAL BEING ANOTHER ETHYLENICALLY UNSATURATED MONOMERIC MATERIAL THAT IS COPOLYMERIZABLE WITH ACRYLONITRILE THEN CARRYING OUT THE POLYMERIZATION OF THE DISSOLVED MONOMERIC MATERIAL IN THE DIMETHYL SULFOXIDE TO FORM A FIBER-FORMING POLYMERIC PRODUCT CONTAINING ACRYLONITRILE POLYMERIZED IN THE POLYMER MOLECULE IN SPINNABLE SOLUTION IN SAID DIMETHYL SULFOXIDE.
Claim 2
Dependent Claim
107 words
METHOD FOR PREPARING SPINNABLE, DISSOLVED FIBERFORMING SYSTEMS WHICH COMPRISES DISSOLVING A POLYMERIZABLE MONOETHYLENICALLY UNSATURATED, ACRYLONITRILECONTAINING MONOMERIC MATERIAL IN DIMETHYL SULFOXIDE, SAID MONOETHYLENICALLY UNSATURATED MONOMERIC MATERIAL COMPRISING ACRYLONITRILE WHICH IS EMPLOYED IN A SUFFICIENT QUANTITY TO OBTAIN A RESULTING DISSOLVED POLYMERIC PRODUCT WHICH CONTAINS IN THE POLYMER MOLECULE AT LEAST ABOUT 80 PERCENT BY WEIGHT OF ACRYLONITRILE, ANY BALANCE OF SAID MONOMERIC MATERIAL BEING ANOTHER ETHYLENICALLY UNSATURATED MONOMERIC MATERIAL THAT IS COPOLYMERIZABLE WITH ACRYLONITRILE THEN CARRYING OUT THE POLYMERIZATION OF THE DISSOLVED MONOMERIC MATERIAL IN THE DIMETHYL SULFOXIDE TO FORM A FIBER-FORMING POLYMERIC PRODUCT CONTAINING ACRYLONITRILE POLYMERIZED IN THE POLYMER MOLECULE IN SPINNABLE SOLUTION IN SAID DIMETHYL SULFOXIDE.
References Cited (Backward Citations)
US2768148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |