Patent US3256156A successfully refreshed from Google Patents.
US3256156A
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Process for producing optically-active alpha-alkyl-substituted phenoxy-acetic acids
Assignee: Bayer AG
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Filing: 1962-09-11
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Granted: 1966-06-14
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Expires: 1982-09-11
Abstract
No abstract record available.
Inventors
- 👤 Frommer Werner
- 👤 Kubin Hermann
- 👤 Rauenbusch Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:50
CPC Classifications
C; C12; C12P; C12P41/00; C12P41/006; C12P7/00; C12P7/40; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/929; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
PROCESS FOR THE PRODUCTION OF OPTICALLY-ACTIVE PHENOXYACETIC ACIDS SUBSTITUTED AT THE ALPHA-CARBON ATOM WITH A LOWER ALKYL FROM RACEMIC COMPOUNDS OF THE SAME, THAT COMPRISES CONVERTING SUCH A RACEMIC ALPHA-ALKYL SUBSTITUTED PHENOXYACETIC ACID INTO A MEMBER OF THE GROUP CONSISTING OF THE N-BUTYLAMIDE AND ISO-BUTYLAMIDE RACEME, SUBJECTING SAID AMIDE RACEME IN AQUEOUS MEDIUM TO THE ACTION OF THE FUNGUS FUSARIUM OXYSPORUM TO EFFECT COMPLETE HYDROLYSIS OF ONE OF THE OPTICALLY-ISOMERIC AMIDES OF SAID RACEME, AND SEPARATING AND RECOVERING FROM THE REACTION MIXTURE THE ENANTIOMERIC ALPHA-ALKYL-SUBSTITUTED PHENOXYACETIC ACID THUS PRODUCED.
Claim 2
Dependent Claim
89 words
PROCESS FOR THE PRODUCTION OF OPTICALLY-ACTIVE PHENOXYACETIC ACIDS SUBSTITUTED AT THE ALPHA-CARBON ATOM WITH A LOWER ALKYL FROM RACEMIC COMPOUNDS OF THE SAME, THAT COMPRISES CONVERTING SUCH A RACEMIC ALPHA-ALKYL SUBSTITUTED PHENOXYACETIC ACID INTO A MEMBER OF THE GROUP CONSISTING OF THE N-BUTYLAMIDE AND ISO-BUTYLAMIDE RACEME, SUBJECTING SAID AMIDE RACEME IN AQUEOUS MEDIUM TO THE ACTION OF THE FUNGUS FUSARIUM OXYSPORUM TO EFFECT COMPLETE HYDROLYSIS OF ONE OF THE OPTICALLY-ISOMERIC AMIDES OF SAID RACEME, AND SEPARATING AND RECOVERING FROM THE REACTION MIXTURE THE ENANTIOMERIC ALPHA-ALKYL-SUBSTITUTED PHENOXYACETIC ACID THUS PRODUCED.
References Cited (Backward Citations)
US2616828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |