US2686136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeable resin-modified acrylonitrile trile polymers and method for producing same
Assignee: EIDP Inc
•
Filing: 1951-07-24
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Granted: 1954-08-10
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Expires: 1971-07-24
Abstract
No abstract record available.
Inventors
- 👤 William R Mcclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:31
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/18; C08L33/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/3187; Y10T428/31873; Y10T428/31877
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS WHEREIN AN AQUEOUS IRREVERSIBLE GEL POLYACRYLONITRILE FIBER CONTAINING 20 TO 50% ACRYLONITRILE POLYMER SAID POLYMER BEING OF AT LEAST 85% ACRYLONITRILE CONTENT, IS IMPREGNATED WITH AN AQUEOUS SOLUTION OF A THERMOSETTING UREA/FORMALDEHYDE/HEXAMETHYLENE DIAMINE RESIN CONTAINING 1.5 TO 1.7 MOLES FORMALDEHYDE AND 0.03 TO 0.12 MOLE HEXAMETHYLENE DIAMINE, PER MOLE OF UREA UNTIL FROM 10 TO 20%, BY WEIGHT OF THE TOTAL OF ACRYLONITRILE POLYMER AND THE RESIN, OF SAID RESIN IS INCORPORATED IN THE GEL FIBER, THE RESIN IMPREGNATED ACRYLONITRILE POLYMER FIBER IS DRIED, AND THE RESIN IS HEAT SET IN THE FIBER BY BAKING.
Claim 2
Dependent Claim
97 words
A PROCESS WHEREIN AN AQUEOUS IRREVERSIBLE GEL POLYACRYLONITRILE FIBER CONTAINING 20 TO 50% ACRYLONITRILE POLYMER SAID POLYMER BEING OF AT LEAST 85% ACRYLONITRILE CONTENT, IS IMPREGNATED WITH AN AQUEOUS SOLUTION OF A THERMOSETTING UREA/FORMALDEHYDE/HEXAMETHYLENE DIAMINE RESIN CONTAINING 1.5 TO 1.7 MOLES FORMALDEHYDE AND 0.03 TO 0.12 MOLE HEXAMETHYLENE DIAMINE, PER MOLE OF UREA UNTIL FROM 10 TO 20%, BY WEIGHT OF THE TOTAL OF ACRYLONITRILE POLYMER AND THE RESIN, OF SAID RESIN IS INCORPORATED IN THE GEL FIBER, THE RESIN IMPREGNATED ACRYLONITRILE POLYMER FIBER IS DRIED, AND THE RESIN IS HEAT SET IN THE FIBER BY BAKING.
References Cited (Backward Citations)
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Cited
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US2491454A
Cited
US2463032A
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |