US3649596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamic acid from tricyclo-(4.2.2.0 2 5)-dec-7-ene - 3 4 9 10 - tetracarboxylic dianhydride
Assignee: EIDP Inc
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Filing: 1964-08-05
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Granted: 1972-03-14
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Expires: 1984-08-05
Abstract
Abstract POLYMERIC ACID COMPOSTIONS COMPRISING THE REACTION PRODUCT OF AN ORGANIC DIAMINE AND A TRICYCLIC TETRACARBOXYLIC DIANHYDRIDE HAVING THE STRUCTURAL FORMULA, 2,2'',5,5''-TETRA(O=)OCTAHYDROTRICYCLO(4.2.2.0(2,5)) DEC-9-ENO(3,4-C:7,8-C'')DIFURAN WHEREIN R2 THROUGH R7 ARE INDIVIDUALLY SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, C1 TO C6 AKLYL, CHLORINE, AND FLUORINE; AND R8 THROUGH R11 ARE INDIVIDUALLY SELECTED FROM THE GROUP OF HYDROGEN, METHYL, CHLORINE AND FLOUIRNE. THE POLYAMIC ACID COMPOSITONS ARE USEFUL AS COATING COMPOSITIONS, PATRICULARYL FOR WIRE COATINGS.
Inventors
- 👤 Shaler G Smith Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:25
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |