US4022836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-Aminomethyleneindanone analgesic agents
Assignee: Pfizer Inc
•
Filing: 1972-12-06
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Granted: 1977-05-10
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Expires: 1992-12-06
Abstract
Abstract Novel 2-aminomethyleneindanones having analgesic activity are disclosed.
Inventors
- 👤 Philip D. Hammen
- 👤 George M. Milne, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:47
CPC Classifications
C; C07; C07C; C07C225/00; C07C225/02; C07C225/14; C07C225/16; C07C225/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
71 words
A compound of the formula ##STR6## and the pharmaceutically acceptable acid addition salts thereof, wherein R 1 , R 2 , R 3 and R 4 are each selected from the group consisting of hydrogen, hydroxy lower alkyl and lower alkyl, R 7 and R 8 are each selected from the group consisting of hydrogen, fluorine and chlorine, and R 9 is chosen from the group consisting of hydrogen and fluorine.
Claim 2
Dependent Claim
71 words
A compound of the formula ##STR6## and the pharmaceutically acceptable acid addition salts thereof, wherein R 1 , R 2 , R 3 and R 4 are each selected from the group consisting of hydrogen, hydroxy lower alkyl and lower alkyl, R 7 and R 8 are each selected from the group consisting of hydrogen, fluorine and chlorine, and R 9 is chosen from the group consisting of hydrogen and fluorine.
Claim 3
Dependent Claim
13 words
A compound of claim 1 wherein R 3 and R 4 are hydrogen.
Claim 4
Dependent Claim
22 words
A compound of claim 2 wherein R 1 , R 2 , R 7 , R 8 and R 9 are hydrogen.
Claim 5
Dependent Claim
24 words
A compound of claim 2 wherein R 7 , R 8 and R 9 are hydrogen and R 1 and R 2 are methyl.
Claim 6
Dependent Claim
24 words
A compound of claim 2 wherein R 1 , R 2 , R 7 and R 9 are hydrogen and R 8 is chlorine.
Claim 7
Dependent Claim
24 words
A compound of claim 2 wherein R 1 , R 2 , R 8 and R 9 are hydrogen and R 7 is chlorine.
Claim 8
Dependent Claim
24 words
A compound of claim 2 wherein R 1 , R 2 , R 7 and R 8 are hydrogen and R 9 is chlorine.
Claim 9
Dependent Claim
15 words
A compound of claim 1 wherein R 3 is hydrogen and R 4 is methyl.
Claim 10
Dependent Claim
23 words
A compound of claim 8 wherein R 1 , R 2 , R 7 , R 8 and R 9 are each hydrogen.
Claim 11
Dependent Claim
14 words
A compound of claim 1 wherein R 3 and R 4 are each methyl.
Claim 12
Dependent Claim
23 words
A compound of claim 10 wherein R 1 , R 2 , R 7 , R 8 and R 9 are each hydrogen.
Claim 13
Dependent Claim
25 words
A compound of claim 10 wherein R 1 , R 2 , R 7 and R 9 are each hydrogen and R 8 is chlorine.
Claim 14
Dependent Claim
25 words
A compound of claim 10 wherein R 1 , R 2 , R 8 and R 9 are each hydrogen and R 7 is chlorine.
References Cited (Backward Citations)
US3454565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |