Patent US3238181A successfully refreshed from Google Patents.
US3238181A
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Heat resistant polymers containing recurring cyclic imide groups connected by amide or ester linkages
Assignee: De Soto Chemical Coatings Inc
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Filing: 1960-11-03
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Granted: 1966-03-01
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Expires: 1980-11-03
Abstract
No abstract record available.
Inventors
- 👤 Bryce P Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C08G73/00; C08G73/06; C08G73/10; C08G73/14; C08G73/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
A POLYMER HAVING RECURRING CYCLIC IMIDE GROUPS IN THE MAIN CHAIN CONNECTED BY LINKAGES SELECTED FROM THE CLASS CONSISTING OF AMIDE AND ESTER LINKAGES, SAID POLYMER HAVING RECURRING SIDE REACTIVE GROUPS SELECTED FROM THE CLASS CONSISTING OF AMINO, HYDROXYL AND CARBOXYL FOR CROSS-LINKING THE POLYMER.
References Cited (Backward Citations)
US2777830A
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US2241321A
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US2281961A
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US2463977A
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US2502576A
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US2594145A
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US3049518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |