Patent US3708539A successfully refreshed from Google Patents.
US3708539A
Expired / Lapsed
US
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Condensation of ammonia or a primary or secondary amine with an alcohol
Assignee: Union Oil Company of California
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Filing: 1970-02-06
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Granted: 1973-01-02
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Expires: 1990-02-06
Abstract
Abstract AMMONIA OR A PRIMARY OR SECONDARY AMINE IS CONDENSED WITH AN ALCOHOL IN A LIQUID REACTION MEDUM CONTAINING A RUTHENIUM, OSMIUM, RHENIUM OR TECHNETIUM CAT ALYST WHICH IS PREFERABLY IN COMPLEX ASSOCIATION WITH A BIPHYLIC LIGAND. A TYPICAL PROCESS COMPRISES CONTACTING DIBUTYLAMINE WITH BUTANOL IN THE PRESENCE OF RUTHENIUM TRICHLORIDE AND TRIPHENYLPHOSPHINE TO PRODUCE TRIBUTYLAMINE.
Inventors
- 👤 D Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:05
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/01; C07C211/26; C07C211/27; C07C209/00; C07C209/04; C07C209/14; C07C209/16; C07C213/00; C07C213/02
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |