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:
Sep. 28, 1982
Filed:
Feb. 12, 1981
Applicant:
Inventor:
Klaus Hasspacher, Riehen, CH;
Assignee:
Sandoz Ltd., Basel, CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; C07D / ;
U.S. Cl.
CPC ...
424267 ; 546205 ;
Abstract
The invention provides compounds of formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl, R.sub.3 is hydrogen, alkyl, alkenyl, phenylalkyl or a group --(CH.sub.2 --CH.sub.2 --O).sub.n --R.sub.4 in which n is 1 to 3 and R.sub.4 is hydrogen or an acid residue, and the ring A is unsubstituted or substituted, with the proviso that when R.sub.3 is methyl the ring A is substituted. The compounds are useful in the treatment and prophylaxis of allergic conditions.