Patent US4623079B1 successfully refreshed from Google Patents.
US3342838A
Expired / Lapsed
US
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Process for production of glutamic acid and intermediates
Assignee: Noguchi Institute
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Filing: 1962-12-18
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Granted: 1967-09-19
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Expires: 1982-12-18
Abstract
No abstract record available.
Inventors
- 👤 Noyori Gentaro
- 👤 Kurokawa Hidemoto
- 👤 Okazaki Hidehiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:02
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/313; C07D307/04; C07D307/18; C07D307/24; C07D307/34; C07D307/56; C07D307/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A PROCESS FOR PREPARING GLUTAMIC ACID FROM FURFURAL, WHICH COMPRISES OXIDIZING FURFURAL TO YIELD 2-FUROIC ACID, HYDROGENATING THE 2-FUROIC ACID TO YIELD 2-TETRAHYDROFUROIC ACID, OXIDIZING THE 2-TETRAHYDROFUROIC ACID WITH AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, DINITROGEN TETROXIDE, POTASSIUM PERMANGANATE, POTASSIUM BICHROMATE, SODIUM BICHROMATE, CHROMIUM TRIOXIDE, AND FREE OXYGEN-CONTAINING GAS, SAID OXIDIZING WITH FREE OXYGEN-CONTAINING GAS BEING CONDUCTED IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT AND MANGANESE STEARATES, NAPHTHENATES AND ACETATES, TO YIELD AT LEAST ONE COMPOUND OF THE GROUP CONSISTING OF A-HYDORXYGLUTARIC ACID AND $-BUTYROLACTONE-$CARBOXYLIC ACID, AMINATING THE PRODUCT OF THE LATTER OXIDATION AND HYDROLYZING THE THUS-ANIMATED PRODUCT TO YIELD GLUTAMIC ACID.
Claim 2
Dependent Claim
113 words
A PROCESS FOR PREPARING GLUTAMIC ACID FROM FURFURAL, WHICH COMPRISES OXIDIZING FURFURAL TO YIELD 2-FUROIC ACID, HYDROGENATING THE 2-FUROIC ACID TO YIELD 2-TETRAHYDROFUROIC ACID, OXIDIZING THE 2-TETRAHYDROFUROIC ACID WITH AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, DINITROGEN TETROXIDE, POTASSIUM PERMANGANATE, POTASSIUM BICHROMATE, SODIUM BICHROMATE, CHROMIUM TRIOXIDE, AND FREE OXYGEN-CONTAINING GAS, SAID OXIDIZING WITH FREE OXYGEN-CONTAINING GAS BEING CONDUCTED IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT AND MANGANESE STEARATES, NAPHTHENATES AND ACETATES, TO YIELD AT LEAST ONE COMPOUND OF THE GROUP CONSISTING OF A-HYDORXYGLUTARIC ACID AND $-BUTYROLACTONE-$CARBOXYLIC ACID, AMINATING THE PRODUCT OF THE LATTER OXIDATION AND HYDROLYZING THE THUS-ANIMATED PRODUCT TO YIELD GLUTAMIC ACID.
Claim 3
Dependent Claim
76 words
A PROCESS FOR PREPARING AT LEAST ONE COMPOUND OF THE GROUP CONSISTING OF A-HYDROXGLUTARIC ACID AND $-BUTYROLACTONE-$-CARBOXYLIC ACID, WHICH COMPRISES OXIDIZING 2TETRAHYDROFUROIC ACID WITH AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF MITRIC ACID, DINITROGEN TETROXIDE, POTASSIUM PERMANGANATE, POTASSIUM BICHROMATE, SODIUM BICHROMATE, CHROMIUM TRIOXIDE, AND FREE OXYGENCONTAINING GAS, SAID OXIDIZING WITH FREE OXYGEN-CONTAINING GAS BEING CONDUCTED IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT AND MANGANESE STEARATES, NAPHTHENATES AND ACETATES.
Claim 4
Dependent Claim
76 words
A PROCESS FOR PREPARING AT LEAST ONE COMPOUND OF THE GROUP CONSISTING OF A-HYDROXGLUTARIC ACID AND $-BUTYROLACTONE-$-CARBOXYLIC ACID, WHICH COMPRISES OXIDIZING 2TETRAHYDROFUROIC ACID WITH AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF MITRIC ACID, DINITROGEN TETROXIDE, POTASSIUM PERMANGANATE, POTASSIUM BICHROMATE, SODIUM BICHROMATE, CHROMIUM TRIOXIDE, AND FREE OXYGENCONTAINING GAS, SAID OXIDIZING WITH FREE OXYGEN-CONTAINING GAS BEING CONDUCTED IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT AND MANGANESE STEARATES, NAPHTHENATES AND ACETATES.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |