Patent US2493637A successfully refreshed from Google Patents.
US2493637A
Expired / Lapsed
US
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Process for the preparation of aliphatic nitriles
Assignee: Rohm and Haas Co
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Filing: 1948-05-01
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Granted: 1950-01-03
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Expires: 1968-05-01
Abstract
No abstract record available.
Inventors
- 👤 Warren D Niederhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:45
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/22; C11; C11C; C11C1/00; C11C3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE PROCESS OF PREPARING OLEONITRILE WHICH COMPRISES REACTING AMMONIA AND OLEIC ACID IN THE LIQUID PHASE AT A TEMPERATURES FROM 250*C. TO 290*C. IN THE PRESENCE OF A COBALT SALT OF A CARBOXYLIC ACID HAVING TEN TO TWENTY-TWO CARBON ATOMS, SAID SALT BEING PRESENT IN AN AMOUNT EQUIVALENT TO AT LEAST 0.1% COBALT BASED ON THE ORIGINAL WEIGHT OF SAID OLEIC ACID.
Claim 2
Dependent Claim
62 words
THE PROCESS OF PREPARING OLEONITRILE WHICH COMPRISES REACTING AMMONIA AND OLEIC ACID IN THE LIQUID PHASE AT A TEMPERATURES FROM 250*C. TO 290*C. IN THE PRESENCE OF A COBALT SALT OF A CARBOXYLIC ACID HAVING TEN TO TWENTY-TWO CARBON ATOMS, SAID SALT BEING PRESENT IN AN AMOUNT EQUIVALENT TO AT LEAST 0.1% COBALT BASED ON THE ORIGINAL WEIGHT OF SAID OLEIC ACID.
References Cited (Backward Citations)
US2177619A
Cited
US2061314A
Cited
US2144340A
Cited
US2205076A
Cited
US2444828A
Cited
US2460772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |