US3297637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of racemizing optically active amino acids using insoluble resins having ortho-disubstituted benzene nuclei
Assignee: Ajinomoto Co Inc
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Filing: 1963-01-15
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Granted: 1967-01-10
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Expires: 1983-01-15
Abstract
No abstract record available.
Inventors
- 👤 Akabori Shiro
- 👤 Izumi Yoshiharu
- 👤 Toi Koji
- 👤 Ohno Ko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C07; C07C; C07C227/00; C07C227/38; C07C227/40; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08; C07C229/24; C07C229/34; C07C229/36; C07C229/76; C12; C12P; C12P13/00; C12P13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF RACEMIZING AN OPTICALLY ACTIVE ALPHAAMINO ACID WHICH COMPRISES CONTACTING AN AQUEOUS SOLUTION OF SAID AMINO ACID CONTAINING CUPRIC IONS AND HAVING A PH VALUE HIGHER THAN 8 AND A TEMPERATURE HIGHER THAN 20*C. WITH A RESINOUS POLYMER INSOLUBLE IN SAID SOLUTION AND HAVING REPEATING GROUPS CONSISTING OF ORTHODISUBSTITUTED BENZENE NUCLEI, ONE OF THE SUBSTITUENTS OF EACH BENZENE NUCLEUS BEING A FORMYL RADICAL, AND THE OTHER SUBSDTITUENT BEING A PHENOLIC HYDROXYL RADICAL.
Claim 2
Dependent Claim
33 words
A RESINOUS POLYMER INSOLUBLE IN WATER AND HAVING REPEATING GROUPS OF ORTHO-DISUBSTITUTED BENZENE NUCLEI, ONE OF THE SUBSTITUENTS OF EACH BENZENE NUCLEUS BEING A FORMYL RADICAL, AND THE OTHER SUBSTITUENT BEING PHENOLIC HYDROXYL.
References Cited (Backward Citations)
US2683151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |