US3609152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 2-amino-3,4-dihydrogen-inazolin-4-ones and 4-thiones
Assignee: Pfizer Inc
•
Filing: 1970-01-28
•
Granted: 1971-09-28
•
Expires: 1990-01-28
Abstract
Abstract Substituted 2-amino-3,4-dihydroquinazoline-4-one and substituted 2-amino-4-(3H)-quinazolinethionone and their utility as antihypertensive agents.
Inventors
- 👤 Hans-Jurgen E Hess
- 👤 Gerald F Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:52
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N-diethylamino and X is oxygen.
Claim 2
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N-dimethylamino and X is oxygen.
Claim 3
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N-diallylamino and X is oxygen.
Claim 4
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N''-methylpiperazino and X is oxygen.
Claim 5
Dependent Claim
19 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N'' -(n-prophyl)piperazino and X is oxygen.
Claim 6
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N''-allylpiperazino and X is oxygen.
Claim 7
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N-homopiperidino and X is oxygen.
Claim 8
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N''-2-furoylpiperazino and X is oxygen.
Claim 9
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N-diethylamino and X is sulfur.
Claim 10
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N-dimethylamino and X is sulfur.
Claim 11
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N-diallylamino and X is sulfur.
Claim 12
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N-methylpiperazino and X is sulfur.
Claim 13
Dependent Claim
19 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N'' -(n-propyl)piperazino and X is sulfur.
Claim 14
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N''-allylpiperazino and X is sulfur.
Claim 15
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N-homopiperidino and X is sulfur.
Claim 16
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R1 is methoxy, R is N,N''-2-furoylpiperazino and X is sulfur.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |