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:
Nov. 26, 1985
Filed:
Jun. 23, 1980
Klaus Hunger, Kelkheim, DE;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
When diazotizing lower alkyl esters of 3-nitro-4-aminobenzoic acid and coupling them onto 5-(2'-hydroxy-3'-naphthoylamino)-benzimidazolone-(2) which may be substituted in 6'-position by chlorine or bromine, in 1-position by methyl or ethyl and in the benzo-nucleus by chlorine, bromine, methyl, ethyl, methoxy or ethoxy, and such as further illustrated by a representative formula ##STR1## wherein R is alkyl of 1 to 4 carbon atoms, X is hydrogen, chlorine, bromine, methyl, ethyl, methoxy or ethoxy, Y is hydrogen, methyl or ethyl, and Z is hydrogen, chlorine or bromine. Colorants are obtained which are especially useful for pigmenting plastics, spinning masses, printing inks, varnishes and paints. The dyeings obtained therewith are fast to light, weathering, solvents and migration, especially fast to overvarnishing and bleeding.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile