US4173577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenylacetohydroxamic acids
Assignee: Novartis Corp
•
Filing: 1978-02-13
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Granted: 1979-11-06
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Expires: 1998-02-13
Abstract
Abstract Phenylacetohydroxamic acids having the formula I ##STR1## wherein R 1 , R 2 , R 3 and R 4 , independently of each other, represent hydrogen, chlorine, fluorine or bromine atoms or an alkyl or alkoxy group having at most 6 carbon atoms, and wherein R 2 may additionally represent a trifluoromethyl group with the proviso that R 1 , R 2 and R 3 may not simultaneously represent hydrogen atoms and their pharmaceutically acceptable salts with bases, which compounds inhibit plateletaggregation and exhibit valuable pharmacological, in particular, antiphlogistic, analgesic and antipyretic activity.
Inventors
- 👤 Alfred Sallmann
- 👤 Rudolf Pfister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:22
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/30; C07D209/32; C07D209/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A compound of the formula ##STR6## wherein R 1 is methyl or chlorine and each of R 2 and R 3 is hydrogen, methyl or chlorine; or an alkali metal or alkaline earth metal salt thereof.
Claim 2
Dependent Claim
36 words
A compound of the formula ##STR6## wherein R 1 is methyl or chlorine and each of R 2 and R 3 is hydrogen, methyl or chlorine; or an alkali metal or alkaline earth metal salt thereof.
Claim 3
Dependent Claim
11 words
A compound according to claim 1 which is the [o-(2,6-dichloroanilino)-phenyl]-acetohydroxamic acid.
Claim 4
Dependent Claim
11 words
A compound according to claim 1 which is the [o-(3-chloro-o-toluidino)-phenyl]-acetohydroxamic acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |