US2958674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymethyl methacrylate-partial alkyl ester of polymethacrylic anhydride blend and method for preparing same
Assignee: Goodrich Corp
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Filing: 1958-08-11
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Granted: 1960-11-01
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Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 Lawrence F Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L33/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE COMPOSITION COMPRISING FROM 75 TO 95 PARTS BY WEIGHT OF POLYMETHYL METHACRYLATE AND FROM 5 TO 25 PARTS BY WEIGHT BASED ON THE WEIGHT OF SAID POLYMETHYL METHACRYLATE OF A POLYMER HAVING ESTER AND CARBOXYL GROUPS ON THE MAIN POLYMER CHAIN, SAID ESTER AND CARBOXYL GROUPS BEING SO INTERSPERSED THAT NOT MORE THAN ONE ACYL GROUP OF EACH ANHYDRIDE GROUP ON A PARENT ANHYDRIDE HOMOPOLYMER HAVING THE STRUCTURE
Claim 2
Dependent Claim
69 words
THE COMPOSITION COMPRISING FROM 75 TO 95 PARTS BY WEIGHT OF POLYMETHYL METHACRYLATE AND FROM 5 TO 25 PARTS BY WEIGHT BASED ON THE WEIGHT OF SAID POLYMETHYL METHACRYLATE OF A POLYMER HAVING ESTER AND CARBOXYL GROUPS ON THE MAIN POLYMER CHAIN, SAID ESTER AND CARBOXYL GROUPS BEING SO INTERSPERSED THAT NOT MORE THAN ONE ACYL GROUP OF EACH ANHYDRIDE GROUP ON A PARENT ANHYDRIDE HOMOPOLYMER HAVING THE STRUCTURE
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |