US3639382A
Expired / Lapsed
US
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O-ethyl threonine derivatives
Assignee: Merck and Co Inc
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Filing: 1967-12-22
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Granted: 1972-02-01
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Expires: 1987-12-22
Abstract
Abstract THIS DISCLOSURE RELATES TO NEW COMPOUNDS REPRESENTED BY O-ETHYL THREONINE, AS WELL AS N-SUBSTITUTED AND CARBOXYSUBSTITUTED DERIVATIVES THEREOF. SEVERAL OF THE COMPOUNDS, AND ESPECIALLY THE L-ISOMERS, ARE USEFUL IN THE TREATMENT OF LIVESTOCK TO CONTROL INFECTION BY PLEUROPNEUMONIA-LIKE ORGANISMS.
Inventors
- 👤 Burton G Christensen
- 👤 William J Leanza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:13
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/30; C07D263/34; C07D263/44; C07C; C07C243/00; C07C243/24; C07C243/26; C07C243/34; C07C59/00; C07C59/125; C07C59/135; C07F; C07F3/00; C07F3/10; C07K; C07K5/00; C07K5/04; C07K5/06; C07K5/06008; C07K5/06017; C07K5/06026; C07K5/06034
Claims Analysis
Total Claims: 0
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |