Patent US2811556A successfully refreshed from Google Patents.
US2811556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing secondary aliphatic amines
Assignee: Armour and Co
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Filing: 1954-06-11
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Granted: 1957-10-29
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Expires: 1974-06-11
Abstract
No abstract record available.
Inventors
- 👤 Sydney H Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:13
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/44; C07C209/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF PREPARING SECONDARY AMINES FROM NITRILES, COMPRISING CONTACTING THE NITRILE REACTANT WITH HYDROGEN IN THE PRESENCE OF A COPPER-CHROMIUM OXIDE HYDROGENATION CATALYST AT HYDROGENATION TEMPERATURES AND PRESSURES, SAID NITRILE REACTANT BEING SELECTED FROM THE GROUP CONSISTING OF ALKENE NITRILES, ALKANE NITRILES, AND MIXTURES OF ALKANE AND ALKENE NITRILE, SAID CATALYST CONTAINING SUBSTANTIAL AMOUNTS OF BOTH COPPER AND CHROMIUM OXIDE, AND CONTINUING SAID CONTACTING UNTIL A SUBSTANTIAL PORTION OF SAID NITRILE REACTANT IS CONVERTED TO SECONDARY AMINES.
Claim 2
Independent Claim
78 words
THE METHOD OF PREPARING SECONDARY AMINES FROM NITRILES, COMPRISING CONTACTING THE NITRILE REACTANT WITH HYDROGEN IN THE PRESENCE OF A COPPER-CHROMIUM OXIDE HYDROGENATION CATALYST AT HYDROGENATION TEMPERATURES AND PRESSURES, SAID NITRILE REACTANT BEING SELECTED FROM THE GROUP CONSISTING OF ALKENE NITRILES, ALKANE NITRILES, AND MIXTURES OF ALKANE AND ALKENE NITRILE, SAID CATALYST CONTAINING SUBSTANTIAL AMOUNTS OF BOTH COPPER AND CHROMIUM OXIDE, AND CONTINUING SAID CONTACTING UNTIL A SUBSTANTIAL PORTION OF SAID NITRILE REACTANT IS CONVERTED TO SECONDARY AMINES.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |