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:
May. 03, 1994
Filed:
Nov. 30, 1992
Hans R Meyer, Binningen, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
The invention relates to pyrazoline compounds of formula ##STR1## wherein R.sub.1 is hydrogen or methyl, R.sub.2 and R.sub.3 are each independently of the other methyl, ethyl or hydroxyethyl, R.sub.4 is hydrogen or chlorine, R.sub.5 and R.sub.6 are each independently of the other hydrogen or methyl, R.sub.7 is hydrogen, methyl or phenyl, n is 0 or 1, with the proviso that, if n is 0 and R.sub.4 to R.sub.7 are hydrogen, R.sub.2 is methyl and R.sub.3 is hydroxyethyl, and X.sup..crclbar. is a C.sub.1 -C.sub.3 alkanoate, C.sub.1 -C.sub.4 alkanephosphonate, C.sub.1 -C.sub.4 alkanesulfonate, phosphite, sulfamate or glycolate anion and, if R.sub.1 is methyl, X.sup..crclbar. is also a methosulfate, chloride or bromide ion, to the preparation of said compounds, to the use thereof as fluorescent whitening agents, and to novel hydrazine intermediates of formula ##STR2## wherein R.sub.2 and R.sub.3 are methyl, ethyl or hydroxyethyl, and the acetone hydrazones and salts thereof.