US3833681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyimidosiloxane ester carbonate copolymers
Assignee: General Electric Co
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Filing: 1972-06-29
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Granted: 1974-09-03
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Expires: 1992-06-29
Abstract
Abstract POLYMIDOSILOXANE ESTER CARBONATE COPOLYMERS ARE PREPARED BY REACTING A CARBONYL HALIDE OR OTHER CARBONATE PRECURSOR WITH A MIXTURE OF A BIS(CARBOXYPHTHALIMIDE), ORGANOPOLYSILOXANE HAVING HYDROXY OR CARBOXY FUNCTIONAL TERMINAL GROUPS AND A DIHYDROXY AROMATIC COMPOUND. THE NOVEL COPOLYMERS ARE PARTICULARLY USEFUL AS ELECTRICAL INSULATION, MOLDING COMPOUNDS, AND THOUGH FLEXIBLE COATINGS AND FILMS.
Inventors
- 👤 F Holub
- 👤 D Pauze
- 👤 C Bialous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:11
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/448; C08G63/00; C08G63/68; C08G63/695; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G77/452; C08G77/455; C08G77/48; C08G77/54
Claims Analysis
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |