US2514549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of amino-acids and intermediates therefor
Assignee: Celanese Corp
•
Filing: 1946-12-10
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Granted: 1950-07-11
•
Expires: 1966-12-10
Abstract
No abstract record available.
Inventors
- 👤 Lincoln James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:59
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
PROCESS FOR THE PRODUCTION OF ESTERS OF FORMYL-AMINO ACIDS, IN WHICH THE FORMYL-AMINO GROUPS ARE SEPARATED FROM THE ESTERIFIED CARBOXYL GROUPS BY MORE THAN ONE CARBON ATOM, WHICH COMPRISES HYDROGENATING ESTERS OF CYANO-ACIDS IN THE PRESENCE OF AN ESTER OF FORMIC ACID AT A TEMPERATURE OF 60 TO 120*C. UNDER SUPERATMOSPHERIC PRESSURE OF HYDROGEN, USING A CATALYST SELECTED FROM THE GROUP WHICH CONSISTS OF RANEY NICKEL AND RANEY COBALT.
Claim 2
Dependent Claim
69 words
PROCESS FOR THE PRODUCTION OF ESTERS OF FORMYL-AMINO ACIDS, IN WHICH THE FORMYL-AMINO GROUPS ARE SEPARATED FROM THE ESTERIFIED CARBOXYL GROUPS BY MORE THAN ONE CARBON ATOM, WHICH COMPRISES HYDROGENATING ESTERS OF CYANO-ACIDS IN THE PRESENCE OF AN ESTER OF FORMIC ACID AT A TEMPERATURE OF 60 TO 120*C. UNDER SUPERATMOSPHERIC PRESSURE OF HYDROGEN, USING A CATALYST SELECTED FROM THE GROUP WHICH CONSISTS OF RANEY NICKEL AND RANEY COBALT.
References Cited (Backward Citations)
DE597305C
Cited
US2394230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |