US3290225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the resolution of d, l-alpha-methyl-beta-(3, 4-dihydroxyphenyl)-alanine into its optical antipodes
Assignee: Merck and Co Inc
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Filing: 1964-04-20
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Granted: 1966-12-06
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Rauenbusch Erich
- 👤 Frommer Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:18
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS FOR THE RESOLUTION OF D,L-A-METHYL-B-(3,4DIHYDROXYPHENYL)-ALANINE ITS OPTICAL ANTIPODES WHICH COMPRISES CAUSING BACTERIA AND EXTRACTS PRODUCED THEREFROM OBTAINED BY ADDING A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
26 words
A PROCESS FOR THE RESOLUTION OF D,L-A-METHYL-B-(3,4DIHYDROXYPHENYL)-ALANINE ITS OPTICAL ANTIPODES WHICH COMPRISES CAUSING BACTERIA AND EXTRACTS PRODUCED THEREFROM OBTAINED BY ADDING A COMPOUND OF THE FORMULA
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |