Patent US2762835A successfully refreshed from Google Patents.
US2762835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of amino nitriles
Assignee: Celanese Corp
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Filing: 1953-03-12
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Granted: 1956-09-11
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Expires: 1973-03-12
Abstract
No abstract record available.
Inventors
- 👤 Swerdloff Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:10
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
PROCESS FOR THE PRODUCTION OF AMINONITRILES FROM DINITRILES, WHICH COMPRISES REACTING AN ALIPHATIC DINITRILE WITH HYDROGEN UNDER PRESSURE IN THE PRESENCE OF AN ORGANIC SOLVENT THAT IS SUBTANTIALLY INERT TO HYDROGEN UNDER THE CONDITIONS OF REACTION AND A HYDROGENATION CATALYST, AND TERMINATING THE REACTION AFTER AT LEAST ABOUT 40% AND BEFORE MORE THAN 65% OF THE DINITRILE ORIGINALLY PRESENT IS REACTED.
Claim 2
Dependent Claim
61 words
PROCESS FOR THE PRODUCTION OF AMINONITRILES FROM DINITRILES, WHICH COMPRISES REACTING AN ALIPHATIC DINITRILE WITH HYDROGEN UNDER PRESSURE IN THE PRESENCE OF AN ORGANIC SOLVENT THAT IS SUBTANTIALLY INERT TO HYDROGEN UNDER THE CONDITIONS OF REACTION AND A HYDROGENATION CATALYST, AND TERMINATING THE REACTION AFTER AT LEAST ABOUT 40% AND BEFORE MORE THAN 65% OF THE DINITRILE ORIGINALLY PRESENT IS REACTED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |