US3366679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing optically active l-alpha-methyl-3, 4-dihydroxy phenylalanine
Assignee: Merck and Co Inc
•
Filing: 1963-09-19
•
Granted: 1968-01-30
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Donald F Reinhold
- 👤 Sletzinger Meyer
- 👤 John M Chemerda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:09
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3157689A
Cited
US2868818A
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US2768195A
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US2749358A
Cited
US2923735A
Cited
US3023235A
Cited
US3151149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |