US2656336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing dye-receptive acrylonitrile polymers
Assignee: Solutia Inc
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Filing: 1949-07-23
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Granted: 1953-10-20
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Expires: 1969-07-23
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:23
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/35; D06M13/325; D06M13/328; D06M13/332; D06M13/352; D06M13/355; D06M13/368
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD FOR PREPARING A DYE-RECEPTIVE FIBER WHICH COMPRISES REACTING A FIBER OF A COPOLYMER OF FROM 75 TO 98 PER CENT OF ACRYLONITRILE AND FROM TWO TO 25 PER CENT OF A VINYL ESTER OF A MONOCARBOXYLIC ACID HAVING UP TO EIGHT CARBON ATOMS AND A HALOGEN ATOM SUBSTITUTED ON THE ALPHA CARBON ATOM WITH AN AMINO COMPOUND OF THE GROUP CONSISTING OF PRIMARY ALKYLAMINES, SECONDARY ALKYL AMINES, ETHANOL AMINES, PYRIDINE, MORPHOLINE, POLYMETHYLENE POLYAMINES, AND THE CYCLOHEXYL AMINES, WHEREIN THE ALKYL GROUPS, THE ETHANOL GROUPS, THE POLYMETHYLENE GROUPS, AND THE CYCLOHEXYL GROUPS CONTAIN NO OTHER SUBSTITUENTS.
Claim 2
Independent Claim
97 words
A METHOD FOR PREPARING A DYE-RECEPTIVE FIBER WHICH COMPRISES REACTING A FIBER OF A COPOLYMER OF FROM 75 TO 98 PER CENT OF ACRYLONITRILE AND FROM TWO TO 25 PER CENT OF A VINYL ESTER OF A MONOCARBOXYLIC ACID HAVING UP TO EIGHT CARBON ATOMS AND A HALOGEN ATOM SUBSTITUTED ON THE ALPHA CARBON ATOM WITH AN AMINO COMPOUND OF THE GROUP CONSISTING OF PRIMARY ALKYLAMINES, SECONDARY ALKYL AMINES, ETHANOL AMINES, PYRIDINE, MORPHOLINE, POLYMETHYLENE POLYAMINES, AND THE CYCLOHEXYL AMINES, WHEREIN THE ALKYL GROUPS, THE ETHANOL GROUPS, THE POLYMETHYLENE GROUPS, AND THE CYCLOHEXYL GROUPS CONTAIN NO OTHER SUBSTITUENTS.
References Cited (Backward Citations)
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Cited
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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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |