Patent US3682793A successfully refreshed from Google Patents.
US3682793A
Expired / Lapsed
US
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Process for hydrodimerizing acrylonitrile
Assignee: Asahi Kasei Corp
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Filing: 1971-04-21
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Granted: 1972-08-08
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Expires: 1991-04-21
Abstract
Abstract IN THE PROCESS FOR HYDRODIMERIZING ACRYLONITRILE, THE IMPROVEMENT WHICH COMPRISES CONTACTING AN ELECTROLYTE EFFLUENT CONTAINING AN ELECTROLYTIC SUPPORTING SALT, ACRYLONITRILE, ADIPONITRILE AND ELECTRODE REACTION-IMPAIRING MATERIALS WITH A CATION EXCHANGE RESIN, THEREBY REMOVING THE ELECTRODE-REACTION IMPAIRING MATERIALS BY ADSORPTION ON THE RESIN AND CIRCULATING THE SOLUTION HAVING PASSED THROUGH THE ION EXCHANGE RESIN INTO THE ELECTROLYTIC CELL FOR REUSE IN THE ELECTROLYSIS WHILE CONDUCTING THE ELECTROLYSIS.
Inventors
- 👤 Maomi Seko
- 👤 Akira Yomiyama
- 👤 Shinsaku Ogawa
- 👤 Tetsuya Miyake
- 👤 Toshiro Isoya
- 👤 Koji Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/29; C25B3/295; C25B3/01; C25B3/09
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |