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:
Jul. 11, 1978
Filed:
Jan. 05, 1977
Theodore Heinrich Ashorn, Tampere, FI;
Paul Elis Laine, Tampere, FI;
G. A. Serlachius Oy, Mantta, FI;
Abstract
A method for polymerizing sulfonated lignin containing materials by adjusting the pH of the materials to a pH below 7, adjusting the moisture content of the materials to a value sufficient to allow the conversion to proceed, but less than 15 percent, and then subjecting the thus treated materials to heating at a temperature from 80.degree. to 225.degree. C in a manner to maintain the moisture content of the material at a value sufficient to allow the conversion to proceed, but less than 15 percent, and for a time period sufficient to form products having a viscosity of at least 25 percent higher than the viscosity of the starting material. The products obtained are useful as dispersants and extenders.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile