US3213106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of racemizing optically active alpha acids
Assignee: Ajinomoto Co Inc
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Filing: 1962-11-13
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Granted: 1965-10-19
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Sasaji Ichiro
- 👤 Hara Minoru
- 👤 Tatsumi Susumu
- 👤 Seki Kenji
- 👤 Akashi Takekazu
- 👤 Ohno Ko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:11
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/20; C07C; C07C229/00; C07C229/02; C07C229/34; C07C229/36; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16; C12; C12P; C12P13/00; C12P13/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
A PROCESS OF RACEMIZING AN OPTICALLY ACTIVE AMINO ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE AMINO ACIDS ALANINE, LEUCINE, VALINE, PHENYLALANINE, TRYPTOPHAN, METHIONINE, ASPARTIC ACID, HOMOCYSTEIC ACID, AND PROLINE, AND THE SALTS OF SAID AMINO ACIDS WITH INORGANIC BASES AND STRONG ACIDS IN A RATION OF NO MORE THAN ONE MOL EQUIVALENT OF SAID INORGANIC BASES AND STRONG ACIDS PER MOL OF SAID AMINO ACID, WHICH COMPRISES HEATING SAID COMPOUND IN WATER FREE FROM STRONG BASES ANS STRONG ACIDS TO A TEMPERATURE BETWEEN 150* AND 250*C., AND LOWER THAN THE DECOMPOSITION TEMPERATURE OF SAID COMPOUND IN SAID WATER UNTIL SAID COMPOUND IS AT LEAST PARTLY RACEMIZED.
Claim 2
Dependent Claim
108 words
A PROCESS OF RACEMIZING AN OPTICALLY ACTIVE AMINO ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE AMINO ACIDS ALANINE, LEUCINE, VALINE, PHENYLALANINE, TRYPTOPHAN, METHIONINE, ASPARTIC ACID, HOMOCYSTEIC ACID, AND PROLINE, AND THE SALTS OF SAID AMINO ACIDS WITH INORGANIC BASES AND STRONG ACIDS IN A RATION OF NO MORE THAN ONE MOL EQUIVALENT OF SAID INORGANIC BASES AND STRONG ACIDS PER MOL OF SAID AMINO ACID, WHICH COMPRISES HEATING SAID COMPOUND IN WATER FREE FROM STRONG BASES ANS STRONG ACIDS TO A TEMPERATURE BETWEEN 150* AND 250*C., AND LOWER THAN THE DECOMPOSITION TEMPERATURE OF SAID COMPOUND IN SAID WATER UNTIL SAID COMPOUND IS AT LEAST PARTLY RACEMIZED.
Claim 3
Dependent Claim
14 words
A PROCESS AS SET FORTH IN CLAIM 1, WHEREIN SAID AMINO ACID IS TRYPTOPHAN.
References Cited (Backward Citations)
US2586154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |