US4252943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamate derivatives of mercaptoacyl hydroxy prolines
Assignee: ER Squibb and Sons LLC
•
Filing: 1980-01-18
•
Granted: 1981-02-24
•
Expires: 2000-01-18
Abstract
Abstract New carbamate derivatives of mercaptoacyl hydroxy prolines which have the general formula <IMAGE> are useful as hypotensive agents.
Inventors
- 👤 John Krapcho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:48
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A compound of the formula ##STR20## wherein R o and R 1 each is hydrogen, lower alkyl, allyl, propargyl, cyclo-lower alkyl, phenyl or phenyl substituted with a halogen, lower alkyl, lower alkoxy, lower alkylthio or trifluoromethyl group, or R o and R 1 complete a pyrrolidine, piperidine or morpholine ring.
Claim 2
Dependent Claim
50 words
A compound of the formula ##STR20## wherein R o and R 1 each is hydrogen, lower alkyl, allyl, propargyl, cyclo-lower alkyl, phenyl or phenyl substituted with a halogen, lower alkyl, lower alkoxy, lower alkylthio or trifluoromethyl group, or R o and R 1 complete a pyrrolidine, piperidine or morpholine ring.
Claim 3
Dependent Claim
12 words
A compound as in claim 1 wherein R o is lower alkyl.
Claim 4
Dependent Claim
16 words
A compound as in claim 1 wherein R o is methyl and R 1 is hydrogen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |