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:
Jun. 16, 1987
Filed:
Mar. 13, 1985
Norbert Rieber, Mannheim, DE;
Heinrich Boehm, Neuhofen, DE;
Ernst-Heinrich Pommer, Limburgerhof, DE;
Juergen Dressel, Neuhofen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
1-Hydroxypyrazole derivatives of the formula (I) ##STR1## where A is ##STR2## n is 0 or 1, R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen, chlorine, bromine or iodine, R.sup.4 is hydrogen, a straight-chain or branched, open-chain alkyl, alkenyl or alkynyl radical, a cyclic alkyl, alkenyl or alkynyl radical or aryl or aralkyl, and the radicals R.sup.4 which are capable of substitution may furthermore be monosubstituted or polysubstituted by halogen, haloalkyl, haloalkoxy, alkyl, alkoxy, alkoxycarbonyl, --OH, .dbd.O, --COOH or salts of this, --NO.sub.2 or --CN, have a nitrification-inhibiting action. Substances where R.sup.4 is not hydrogen when n is 0 are novel.