US3792099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Branched polyphenylenes
Assignee: Standard Oil Co
•
Filing: 1972-07-31
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Granted: 1974-02-12
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Expires: 1992-07-31
Abstract
Abstract POLYPHENYLENES WHICH HAVE A SUBSTANTIAL DEGREE OF BRANCHING AND DOUBLE BONDING THROUGH THE META POSITION ARE DISCLOSED. THESE POLYPHENYLENES POSSESS INCREASED SOLUBILITY AND ARE FREE FROM CHLORINE AND SIMILAR IMPURITIES. THEY POSSESS A HIGH DEGREE OF THERMAL STABILITY AND ARE FUSIBLE. THE POLYPHENYLENES DISCLOSED ARE USEFUL IN ABLATIVE MATERIALS AND OTHER POLYMER APPLICATIONS REQUIRING HIGH THERMAL STABILITY.
Inventors
- 👤 Shen Wang Chen
- 👤 A Wennerberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:26
CPC Classifications
C; C08; C08L; C08L65/00; C08L65/02; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882; C08G; C08G61/00; C08G61/02; C08G61/10; C08G2261/00; C08G2261/30; C08G2261/31; C08G2261/312
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |