Patent US3582484A successfully refreshed from Google Patents.
US3582484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous production of diesters
Assignee: Imperial Chemical Industries Ltd
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Filing: 1969-02-14
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Granted: 1971-06-01
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Expires: 1989-02-14
Abstract
Abstract CONTINUOUS PRODUCTION OF ALIPHATIC DICARBOXYLIC ESTERS BY ELECTROSYNTHESIS FROM MONOESTERS OF SHORTER CHAIN ALIPHATIC DICARBOXYLIC ACIDS. PRODUCT IS CONTINUOUSLY REMOVED FROPM THE ELECTROLYSIS ZONE, E.G. BY EXTREACTION WITH HYDROCARBON SOLVENT, AND ANHYDRIDE OF THE SHORTER CHAIN ALIPHATIC DICARBOXYLIC ACID IS CONTINUOUSLY ADDED TO REACT WITH ALCOHOLIC SOLVENT AND THERBY MAINTAINS A STEADY CONCENTRATION OF MONOESTER.
Inventors
- 👤 Ronald William Dennison
- 👤 Frank Stanley Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:01
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/29; C25B3/01; C25B3/07
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |