US3585163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinked aromatic polymers having direct aromatic nuclei to aromatic nuclei linkages
Assignee: Monsanto Chemicals Ltd
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Filing: 1968-07-09
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Granted: 1971-06-15
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Expires: 1988-07-09
Abstract
Abstract DISCLOSED HEREIN ARE CROSSLINKED INSOLUBLE, INFUSIBLE. THERMALLY STABLE POLYPHENYLENE RESINS COMPRISING A PLURALITY OF RECURRING POLYVALENT AROMATIC RADICALS, WHICH ARE CHARACTERIZED BY DIRECT AROMATIC NUCLEI TO AROMATIC NUCLEI LINKAGES, WHICH RESINS ARE PREPARED BY THE THERMAL CONDENSATION REACTION OF AN AROMATIC SULFONYL HALIDE AND AN AROMATIC COMPOUND CONTAINING REPLACEABLE NUCLEAR HYDROGEN ATOMS.
Inventors
- 👤 Alan Jeffrey Neale
- 👤 Terence James Rawlings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:20
CPC Classifications
C; C08; C08G; C08G61/00; C08G75/00; C08G75/20
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |