US4016223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prostaglandin dehydrogenase inhibiting agents
Assignee: Whitby Research Inc
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Filing: 1975-08-07
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Granted: 1977-04-05
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Expires: 1995-08-07
Abstract
Abstract Novel prostaglandin dehydrogenase inhibiting agents having the structural formula <IMAGE> <IMAGE> M is H or a pharmaceutically acceptable salt, X is hydrogen, dialkylaminomethyl, lower alkyl, lower alkoxy, aryl, substituted aryl, halogen, cyano, nitro, trihaloalkyl, -NR1R2 or -NHCOR1 where R1 and R2 are hydrogen, lower alkyl or NH2 and n is 0-5.
Inventors
- 👤 Vithal J. Rajadhyaksha
- 👤 Richard A. Schroer
- 👤 Phillip J. Brock
- 👤 Earl R. Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:36
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/45; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/74; C07C45/75; C07C49/00; C07C49/76; C07C49/82; C07C49/835; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
Compounds having the structural formula ##STR37## wherein M is H or a pharmaceutically acceptable salt; and X is selected from the group consisting of H, halogen, NO 2 , lower alkyl and amino, and n is 0-5.
Claim 2
Dependent Claim
37 words
Compounds having the structural formula ##STR37## wherein M is H or a pharmaceutically acceptable salt; and X is selected from the group consisting of H, halogen, NO 2 , lower alkyl and amino, and n is 0-5.
Claim 3
Dependent Claim
16 words
A compound having the structural formula ##STR38## wherein M is H or a pharmaceutically acceptable salt.
Claim 4
Dependent Claim
16 words
A compound having the structural formula ##STR38## wherein M is H or a pharmaceutically acceptable salt.
References Cited (Backward Citations)
US3851019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |