US3677976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commercially useful polyphenylene polymers and method of production thereof
Assignee: Raytheon Co
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Filing: 1970-04-09
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Granted: 1972-07-18
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Expires: 1990-04-09
Abstract
Abstract COMMERCIALLY USEFUL, FUSIBLE AND TRACTABLE POLYPHENYLENE POLYMERS AND METHOD OF PREPARING THE SAME FROM MONOMERS OF BIPHENYL, TERPHENYLS, QUATERPHENYLS, AND MIXTURES THEREOF, AND MIXTURES OF SAME WITH OTHER AROMATIC MATERIAL AS AROMATIC MONOMERS, OLIGOMERS AND POLYMERS WITH 5 OR LESS AROMATIC RINGS, PREPARED WITH A LEWIS ACID CATALYST AND OXIDANT COMBINATION.
Inventors
- 👤 Leroy J Miller
- 👤 Norman Bilow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:31
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/10; C08G2261/00; C08G2261/30; C08G2261/31; C08G2261/312
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |