Patent US2500378A successfully refreshed from Google Patents.
US3043811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeability of acrylonitrile polymers
Assignee: Dow Chemical Co
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Filing: 1957-06-20
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Granted: 1962-07-10
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Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Teddy G Traylor
- 👤 Armen Ardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:13
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/22; C; C08; C08F; C08F8/00; C08F8/34; D06P1/00; D06P1/44; D06P1/62; D06P1/621; D06P1/622; D06P3/00; D06P3/70; Y; Y10; Y10S; Y10S8/00; Y10S8/18; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
METHOD FOR IMPROVING THE DYEABILITY OF FULLY POLYMERIZED ACRYLONITRILE POLYMERS THAT CONTAIN AT LEAST ABOUT 80 WEIGHT PERCENT OF POLYMERIZED ACRYLONITYRILE IN THE POLYMER MOLECULE WHICH METHOD COMPRISES SUBJECTING THE ACRYLONITRILE POLYMER, WHILE IT IS IN CONTACT WITH A POLAR LIQUID MEDIUM THAT IS CHEMICALLY INERT TO THE POLYMER AND THE SUBSEQUENTLY DEFINED MONOMERIC COMPOUND, TO UP TO ABOUT 20 WEIGHT PERCENT, BASED ON POLYMER WEIGHT, OF A MONOMERIC COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
74 words
METHOD FOR IMPROVING THE DYEABILITY OF FULLY POLYMERIZED ACRYLONITRILE POLYMERS THAT CONTAIN AT LEAST ABOUT 80 WEIGHT PERCENT OF POLYMERIZED ACRYLONITYRILE IN THE POLYMER MOLECULE WHICH METHOD COMPRISES SUBJECTING THE ACRYLONITRILE POLYMER, WHILE IT IS IN CONTACT WITH A POLAR LIQUID MEDIUM THAT IS CHEMICALLY INERT TO THE POLYMER AND THE SUBSEQUENTLY DEFINED MONOMERIC COMPOUND, TO UP TO ABOUT 20 WEIGHT PERCENT, BASED ON POLYMER WEIGHT, OF A MONOMERIC COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |