US3381031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resolution of racemic amino acids
Assignee: Australian National University
•
Filing: 1963-04-12
•
Granted: 1968-04-30
•
Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 Dwyer Lola
- 👤 Halpern Bert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:24
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/06; C07F15/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE METHOD OF RESOLVING A RACEMIC AMINO ACID WHICH COMPRISES BLOCKING THE AMINO GROUP BY REACTION WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF FORMIC, ACETIC, BENZOIC, PHTHALIC, P-NITROBENZOIC AND P-TOLUENESULFONIC, NEUTRALIZING THE MIXTURE WITH AN ALKALINE METAL HYDROXIDE TO FORM AN AQUEOUS SOLUTION, REACTING THE RESULTING SOLUTION WITH AN OPTICALLY ACTIVE METAL COMPLEX SELECTED FROM THE GROUP CONSISTING OF (COBALT-DINITROETHYLENEDIAMINE) ACETATE, (COBALT DINITROETHYLENEDIAMINE)BROMIDE, AND (COBALT OXALATOETHYLENEDIAMINE) BROMIDE, SEPARATING THE RESULTING PRECIPITATE, AND TREATING THE PRECIPITATE WITH AN ALKALI METAL IODIDE, SEPARATING THE SOLID METAL COMPLEX AND RECOVERING THE AMINO ACID FROM THE SOLUTION.
Claim 2
Independent Claim
95 words
THE METHOD OF RESOLVING A RACEMIC AMINO ACID WHICH COMPRISES BLOCKING THE AMINO GROUP BY REACTION WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF FORMIC, ACETIC, BENZOIC, PHTHALIC, P-NITROBENZOIC AND P-TOLUENESULFONIC, NEUTRALIZING THE MIXTURE WITH AN ALKALINE METAL HYDROXIDE TO FORM AN AQUEOUS SOLUTION, REACTING THE RESULTING SOLUTION WITH AN OPTICALLY ACTIVE METAL COMPLEX SELECTED FROM THE GROUP CONSISTING OF (COBALT-DINITROETHYLENEDIAMINE) ACETATE, (COBALT DINITROETHYLENEDIAMINE)BROMIDE, AND (COBALT OXALATOETHYLENEDIAMINE) BROMIDE, SEPARATING THE RESULTING PRECIPITATE, AND TREATING THE PRECIPITATE WITH AN ALKALI METAL IODIDE, SEPARATING THE SOLID METAL COMPLEX AND RECOVERING THE AMINO ACID FROM THE SOLUTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |