The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 1987
Filed:
Aug. 01, 1985
Applicant:
Inventor:
Terry L Wright, Antioch, CA (US);
Assignee:
Merrell Dow Pharmaceuticals Inc., Cincinnati, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546119 ;
Abstract
5-Chloro-3-(substituted)-s-triazolo[4,3-a]pyridine-7-carboxylic acids useful as antiallergic agents are described herein. The compounds are prepared from an appropriate acyl 6-chloro-2-hydrazinopyridine, substituted at the 4-position with a trichloromethyl group or a cyano group, by reaction with polyphosphoric acid.