US3574072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of heterocyclic compounds
Assignee: Universal Oil Products Co
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Filing: 1968-04-03
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Granted: 1971-04-06
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Expires: 1988-04-03
Abstract
Abstract HETEROCYCLIC COMPOUNDS CONTAINING BOTH 5- AND 6-MEMBERED RINGS SUCH AS FURAN, THIOPHENE, PYRROLE, PYRAN, THIOPYRAN, AND PYRIDINE ARE POLYMERIZED BY SUBJECTING THE COMPOUNDS TO ELECTROLYSIS IN THE PRESENCE OF AN ORGANIC SOLVENT, A SPECIFIC EXAMPE BEING THE ELECTROLYSIS OF FURAN IN ACETIC ACID TO FORM POLYFURAN.
Inventors
- 👤 James J Louvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:18
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/128; C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; C08G73/00; C08G73/06; C08G73/0605; C08G73/0611; H01B1/127
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |