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US3867390A Expired / Lapsed US ⏱️ 0.0 years remaining

2 and 3-substituted-4-(heterocyclic-amino-sulfonyl)benzene sulfonamides

Assignee: Pfizer Inc
•
Filing: 1973-08-09
•
Granted: 1975-02-18
•
Expires: 1993-08-09
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Abstract

Abstract Compounds of the formulae: AND AND THE SALTS THEREOF WITH PHARMACEUTICALLY ACCEPTABLE CATIONS WHEREIN R1 is 3-trifluoromethyl, chloro, bromo or fluoro; n and m are each two or three; X is oxygen or sulphur; R2 and R3, when taken separately, are each hydrogen or alkyl having 1 to 4 carbon atoms; R2 and R3, when taken together, are alkylene having 2 to 4 carbon atoms; Y is methylene or a single bond; R4 and R5, when taken separately, are each hydrogen, hydroxy or alkoxy having 1 to 4 carbon atoms, and R4 and R5, when taken together, are oxo or alkylene dioxy having 2 to 4 carbon atoms, each oxygen atom in R4 and R5, when taken separately, and in R4 and R5, when taken together, being separated from the nitrogen atom of the heterocyclic ring by two or more carbon atoms, said compounds being cerebral vasodilators.

Inventors

  • 👤 Peter Edward Cross
  • 👤 Brian Gadsby

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 14:37
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26; A; A61; A61P; A61P9/00; A61P9/08; A61P9/10; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/46; C07D211/92; C07D211/96; C07D265/00; C07D265/28; C07D265/34; C07D265/36; C07D267/00; C07D267/02; C07D267/08; C07D267/10; C09; C09B; C09B31/00; C09B31/02; C09B31/12; C09B31/14

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim 8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 3
Dependent Claim 17 words
The compound of claim 1 wherein R4 and R5 together represent an oxo group attached to Y.
Claim 4
Dependent Claim 12 words
The compound of claim 2 wherein m and n are each 2.
Claim 5
Dependent Claim 9 words
The compound of claim 3 wherein R1 is chloro.
Claim 6
Dependent Claim 19 words
The compound of claim 1 wherein R4 is alkoxy having 1 to 4 carbon atoms and R5 is hydrogen.
Claim 7
Dependent Claim 12 words
The compound of claim 5 wherein m and n are each 2.
Claim 8
Dependent Claim 9 words
The compound of claim 6 wherein R1 is chloro.
Claim 9
Dependent Claim 9 words
The compound of claim 6 wherein R1 is trifluoromethyl.
Claim 10
Dependent Claim 22 words
The compound of claim 1 wherein R1 is 2-chloro, m and n are each 2, R4 is 4-methoxy and R5 is hydrogen.
Claim 11
Dependent Claim 22 words
The compound of claim 1 wherein R1 is 3-chloro, m and n are each 2, R4 is 4-methoxy and R5 is hydrogen.

References Cited (Backward Citations)

US3165550A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-02-17 1978-08-19 1979-02-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-02-17 1982-08-19 1983-02-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-02-17 1986-08-19 1987-02-18 $7700.00 Window Closed / Lapsed

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