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:
Jan. 03, 1978
Filed:
Oct. 29, 1976
Applicant:
Inventors:
David T Connor, Parsippany, NJ (US);
Patricia A Young, Madison, NJ (US);
Max VON Strandtmann, Rockaway, NJ (US);
Assignee:
Warner-Lambert Company, Morris Plains, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 2602 / ; 2603452 ; 424256 ;
Abstract
The present invention relates to 4,10-dihydro-4,10-dioxo-1H-1-benzopyrano[3,2-b]pyridine-3-carboxylic acids, salts and esters having the formula: ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, halogen, hydroxy or lower alkoxy; R.sub.2 is hydrogen, aralkyl or lower alkyl; R.sub.3 is hydrogen or lower alkyl and their pharmaceutically acceptable salts. These compounds are indicated in the management of allergic conditions such as bronchial asthma, hay fever and the like.