Patent US3578611A successfully refreshed from Google Patents.
US3578611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polymers and method
Assignee: Raytheon Co
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Filing: 1967-09-05
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Granted: 1971-05-11
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Expires: 1987-09-05
Abstract
Abstract THE METHOD OF PROVIDING COMMERCIALLY USEFUL NEW AROMATIC POLYMER COMPOSITIONS FROM FUSED AROAMTIC RING COMPOUNDS AS ANTHRACENE, NAPHTHALENE AND PHENANTHRENE, AND MIXTURES THEREOF, INCLUDING MIXTURES OF SAME WITH MONOMERS AND/OR POLYMERS OF BIPHENYL, TERPHENYLS, QUATERPHENYLS, AND OTHER AROMATIC MONOMERS AND PHENYLENE OLIGOMERS AND POLYPHENYLS WITH NOT MORE THAN 5 AROMATIC RINGS, AND THE PRODUCTS THEREOF WHICH ARE HEAT CURABLE RESINS IN COMBINATION WITH MONOFUNCTIONAL AND PREFERABLY POLYFUNCTIOANL CURING AGENTS WHICH PRODUCE REACTIVE ELECTROPHILIC INTERMEDIATES, INCLUDING SUCH PRODUCTS.
Inventors
- 👤 Norman Bilow
- 👤 Leroy J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:43
CPC Classifications
C; C08; C08G; C08G61/00
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |