Patent US3240739A successfully refreshed from Google Patents.
US3240739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making spinning solutions of vinyl cyanide/n-vinyl-3-morpholinone copolymers in aqueous zinc chloride media
Assignee: Dow Chemical Co
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Filing: 1960-04-13
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Granted: 1966-03-15
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Expires: 1980-04-13
Abstract
No abstract record available.
Inventors
- 👤 Stanley A Murdock
- 👤 Armen Ardy
- 👤 Giles R Cokelet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:27
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
METHOD FOR PREPARING SPINNABLE COMPOSITIONS OF FIBER-FORMING DYE-RECEPTIVE VINYL CYANIDE COPOLYMERS WHICH COMPRISES DISSOLVING, IN AN AQUEOUS POLYACRYLONITRILE-DISSOLVING SALINE SOLUTION THAT IS COMPRISED OF ZINC CHLORIDE AS THE ESSENTIAL SALINE CONSTITUENT, A COPOLYMERIZABLE MIXTURE COMPRISED OF (1) BETWEEN ABOUT 80 AND ABOUT 99 WEIGHT OF VINYL CYANIDE AND (2) BETWEEN ABOUT 20 AND ABOUT 1 WEIGHT PERCENT OF AN N-VINYL-3MORPHOLINONE MONOMER OF THE STRUCTURE:
Claim 2
Dependent Claim
64 words
METHOD FOR PREPARING SPINNABLE COMPOSITIONS OF FIBER-FORMING DYE-RECEPTIVE VINYL CYANIDE COPOLYMERS WHICH COMPRISES DISSOLVING, IN AN AQUEOUS POLYACRYLONITRILE-DISSOLVING SALINE SOLUTION THAT IS COMPRISED OF ZINC CHLORIDE AS THE ESSENTIAL SALINE CONSTITUENT, A COPOLYMERIZABLE MIXTURE COMPRISED OF (1) BETWEEN ABOUT 80 AND ABOUT 99 WEIGHT OF VINYL CYANIDE AND (2) BETWEEN ABOUT 20 AND ABOUT 1 WEIGHT PERCENT OF AN N-VINYL-3MORPHOLINONE MONOMER OF THE STRUCTURE:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |