Patent US3784590A successfully refreshed from Google Patents.
US3784590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy and imino containing phosphonic acid diesters
Assignee: Merck and Co Inc
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Filing: 1971-04-13
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Granted: 1974-01-08
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Expires: 1991-04-13
Abstract
Abstract THIS INVENTION RELATES TO (1-HYDROXY-2-METHYL-3-(SUBSTITUTED-IMINO)PENTYL)PHOSPHONIC ACID DIESTERS AND (1-(1HYDROXYETHYL)-2-(SUBSTITUTED-IMINO))PHOSPHONIC ACID DIESTERS WHICH HAVE UTILITY AS INTERMEDIATES IN THE PREPARATION OF (CIS-1,2-EPOXYPROPYL)-PHOSPHONIC ACID. THE ACID PRODUCT THUS OBTAINED AND ITS SALTS ARE ANTIMICROBIAL AGENTS WHICH ARE USEFUL IN INHIBITING THE GROWTH OF GRAM-POSITIVE AND GRAM-NEGATIVE PATHOGENIC BACTERIA.
Inventors
- 👤 R Firestone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:33
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/655; C07F9/65502; C07F9/65505; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/40
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |