US3025278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the dyeability of acrylonitrile polymers
Assignee: EIDP Inc
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Filing: 1955-12-29
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Granted: 1962-03-13
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Leonard S Pitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:09
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A CONTINUOUS PROCESS OF PREPARING POLYMERS OCNTAINING AT LEAST 85% ACRYLONITRILE AND UP TO 15% OF AN ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE THEREWITH OF SUBSTANTIALLY CONSTANT MOLECULAR WEIGHT IN WHICH THE MONOMERIC MATERIAL IS SUBJECT TO HOMOGENEOUS CONSTANT ENVIROMENT POLYMERIZATION IN AN AQUEOUS MEDIUM CONTAINING A WATER-SOLUBLE PERDISULFATE CATALYST AND A WATER-SOLUBLE SULFOXY REDUCING AGENT AS AN AQUEOUS MEDIUM IMPROVEMENT OF PRODUCING AGENT AS AN ACTIVATOR, THE POLYMER WITH BASIC DYES WHICH COMPRISES INCREASING THE AMOUNT OF ACTIVATOR WITH RESPECT TO THE CATALYST TO LOWER THE DYEABILITY, AND DECREASING THE AMOUNT OF ACTIVATOR WITH RESPECT TO THE CATALYST TO INCREASE THE DYEABILITY, AND CONTINUING SUCH ADJUSTMENTS WHEN THE DYEABILITY OF THE POLYMER DEVIATES MORE THAN ABOUT $3% FROM THE SELECTED NORM THE COMBINED AMOUNT OF CATALYST AND ACTIVATOR BEING SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
131 words
IN A CONTINUOUS PROCESS OF PREPARING POLYMERS OCNTAINING AT LEAST 85% ACRYLONITRILE AND UP TO 15% OF AN ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE THEREWITH OF SUBSTANTIALLY CONSTANT MOLECULAR WEIGHT IN WHICH THE MONOMERIC MATERIAL IS SUBJECT TO HOMOGENEOUS CONSTANT ENVIROMENT POLYMERIZATION IN AN AQUEOUS MEDIUM CONTAINING A WATER-SOLUBLE PERDISULFATE CATALYST AND A WATER-SOLUBLE SULFOXY REDUCING AGENT AS AN AQUEOUS MEDIUM IMPROVEMENT OF PRODUCING AGENT AS AN ACTIVATOR, THE POLYMER WITH BASIC DYES WHICH COMPRISES INCREASING THE AMOUNT OF ACTIVATOR WITH RESPECT TO THE CATALYST TO LOWER THE DYEABILITY, AND DECREASING THE AMOUNT OF ACTIVATOR WITH RESPECT TO THE CATALYST TO INCREASE THE DYEABILITY, AND CONTINUING SUCH ADJUSTMENTS WHEN THE DYEABILITY OF THE POLYMER DEVIATES MORE THAN ABOUT $3% FROM THE SELECTED NORM THE COMBINED AMOUNT OF CATALYST AND ACTIVATOR BEING SUBSTANTIALLY CONSTANT.
References Cited (Backward Citations)
US2719834A
Cited
US2743263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |