US3763114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a thermosettable polyimide
Assignee: Wyeth Holdings LLC
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Filing: 1971-07-22
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Granted: 1973-10-02
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Expires: 1991-07-22
Abstract
Abstract THIS INVENTION RELATES TO RAPID-CURING, STABLE, MOLDABLE POLYIMIDES. MORE PARTICULARLY, IT RELATES TO RAPID-CURING STABLE, MOLDABLE, FULLY IMIDIZED POLYIMIDES FORMED FROM A SUITABLE DIANHYDRIDE, METHYLAENEDIAMILINE AND MALEIC ANHYDRIDE, STILL MORE PARTICULARLY, THE INVENTION IS CONCERNED WITH RAPID-CURING, STABLE, MOLDABLE, FULLY IMIDIZED POLYIMIDES FORMED FROM A SUITABLE DIANHYDRIDE, METHYLENEDIAMILINE, AND MALERIC ANHYDRIDE IN THE PRESENCE OF A DIMETHYLFORMAMIDE IMIDIZING MIXTURE.
Inventors
- 👤 G Saluti
- 👤 R Dileone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:27
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/121; C08G73/122
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |