Patent US2455098A successfully refreshed from Google Patents.
US3174992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making aminonitriles
Assignee: Dow Chemical Co
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Filing: 1962-05-21
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Granted: 1965-03-23
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Expires: 1982-05-21
Abstract
No abstract record available.
Inventors
- 👤 Philip G Mccracken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:40
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR MAKING A BETA-AMINO LOWER ALKYL NITRILE WHICH COMPRISES REACTING BY CONTACTING ONE MOLE OF A BETA-HYDROXY LOWER ALKYL NITRILE IN THE LIQUID PHASE WITH ABOUT 3 TO ABOUT 50 MOLES OF AMMONIA AT ABOUT 50*C. TO ABOUT 200*C., UNDER SUPERATMOSPHERIC PRESSURE AND IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A METAL HYDROGENATION CATALYST, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, AND RHODIUM.
Claim 2
Dependent Claim
70 words
A PROCESS FOR MAKING A BETA-AMINO LOWER ALKYL NITRILE WHICH COMPRISES REACTING BY CONTACTING ONE MOLE OF A BETA-HYDROXY LOWER ALKYL NITRILE IN THE LIQUID PHASE WITH ABOUT 3 TO ABOUT 50 MOLES OF AMMONIA AT ABOUT 50*C. TO ABOUT 200*C., UNDER SUPERATMOSPHERIC PRESSURE AND IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A METAL HYDROGENATION CATALYST, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, AND RHODIUM.
References Cited (Backward Citations)
GB436692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |