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:
Oct. 02, 1979
Filed:
Mar. 13, 1978
Applicant:
Inventor:
Goetz E Hardtmann, Morristown, NJ (US);
Assignee:
Sandoz, Inc., East Hanover, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; C07D / ;
U.S. Cl.
CPC ...
424258 ; 546110 ; 544 89 ;
Abstract
Anti-allergic 4-hydroxy-naphthpyridine-2(1H)-one-3-carboxylic acids and esters are prepared by reacting a 1,3-dioxo-1-naphth[4,5-b]oxazine with an alkali metal salt of a malonic ester (and hydrolyzing to obtain the acids).