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US3679639A
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Curable compositions of an unsaturated bis-amide,a diamine,and a multicyclic aromatic compound
Assignee: Rhone Poulenc SA
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Filing: 1970-04-16
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Granted: 1972-07-25
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Expires: 1990-04-16
Abstract
Abstract COMPOSITIONS CURABLE BY HEATING TO GIE RESINS OF GOOD HEAT RESISTANCE COMPRISE (A) A PREPOLYMER OF AN N,N''BIS-IMIDE OF AN UNSATURATED DISCARBOXYLIC ACID AND A DIAMINE AND (B) AN AROMATIC COMPOUND OF 2 TO 3 BENZENE RINGS.
Inventors
- 👤 Michel Bargain
- 👤 Max Gruffaz
- 👤 Serge Laurent
- 👤 Maurice Mallet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
C; C08; C08L; C08L79/00; C08L79/04; C08L79/08; C08L79/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |