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:
Oct. 26, 1982
Filed:
Mar. 04, 1981
Applicant:
Inventors:
Peter Dilling, Isle of Palms, SC (US);
Gerald Prazak, Charleston, SC (US);
Assignee:
Westvaco Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ; C09B / ; C09B / ;
U.S. Cl.
CPC ...
8561 ; 8588 ; 2601 / ; 260208 ;
Abstract
Improved sulfonated lignin surfactants are provided for use as dispersants in dyestuffs. The process for providing the improved surfactants relates to using metals and borate salts to react with the azo dye reducing dihydroxy functions of the lignin molecule through chelation and ester formation mechanisms thereby inhibiting the lignin's azo dye reducing characteristics.