US2708663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of nu-methyl maleimide
Assignee: Acordis UK Ltd
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Filing: 1952-06-02
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Granted: 1955-05-17
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Expires: 1972-06-02
Abstract
No abstract record available.
Inventors
- 👤 Downing John
- 👤 Drewitt James Gordon Napier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
PROCESS FOR THE PREPARATION OF AN ACETONE-INSOLUBLE NITROMETHANE-SOLUBLE COPOLYMER OF N-METHYL MALEIMIDE AND ACRYLONITRILE ALONE, WHICH COMPRISES FORMING A REACTION MIXTURE CONSISTING SUBSTANTIALLY OF 97 PARTS BY WEIGHT OF N-MEGHYL MALEIMIDE, 53 PARTS BY WEIGHT OF ACRYLONITRILE, 800 PARTS BY WEIGHT OF BENZEND AND 1 PART BY WEIGHT OF BENZOLY PEROXIDE, SUBJECTING THE SAID REACTION MIXTURE TO A TEMPERATUE OF 60* C. WITH AGITATION FOR 70 HOURS, WASHING THE POLYMER PRODUCED WITH BENZENE AND DRYING THE SAME.
Claim 2
Dependent Claim
77 words
PROCESS FOR THE PREPARATION OF AN ACETONE-INSOLUBLE NITROMETHANE-SOLUBLE COPOLYMER OF N-METHYL MALEIMIDE AND ACRYLONITRILE ALONE, WHICH COMPRISES FORMING A REACTION MIXTURE CONSISTING SUBSTANTIALLY OF 97 PARTS BY WEIGHT OF N-MEGHYL MALEIMIDE, 53 PARTS BY WEIGHT OF ACRYLONITRILE, 800 PARTS BY WEIGHT OF BENZEND AND 1 PART BY WEIGHT OF BENZOLY PEROXIDE, SUBJECTING THE SAID REACTION MIXTURE TO A TEMPERATUE OF 60* C. WITH AGITATION FOR 70 HOURS, WASHING THE POLYMER PRODUCED WITH BENZENE AND DRYING THE SAME.
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) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |