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. 24, 1981
Filed:
Aug. 22, 1979
Friedrich-Johannes Kammerer, Hochheim am Main, DE;
Ulrich Gebert, Kelkheim, DE;
Hans G Alpermann, Konigstein, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Pyrano-heterocycles of the formula ##STR1## in which R.sup.1 represent hydrogen or an alkyl radical containing up to 4 carbon atoms; R.sup.2 represents hydrogen or an alkyl, alkoxy or haloalkyl radical each having up to 3 carbon atoms, or halogen; or R.sup.1 and R.sup.2 together form an ethylene or propylene group, and R.sup.3 and R.sup.4, independently of each other, are hydrogen or alkyl or alkoxy radicals each of which groups containing up to 3 carbon atoms, which may be unsubstituted or substituted totally or partially with halogen atoms, halogen or alkoxycarbonyl having up to 3 carbon atoms in the alkyl group and R.sup.5 represents a nitro group or hydrogen, their physiologically tolerated salts, processes for preparing these compounds and medicaments containing these compounds.