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:
Apr. 07, 1992
Filed:
Aug. 20, 1990
Applicant:
Inventors:
Wolfgang G Glasser, Blacksburg, VA (US);
Willer De Oliveira, Blacksburg, VA (US);
Stephen S Kelley, Kingsport, TN (US);
Li S Nieh, Mississippi State, MS (US);
Assignees:
Center for Innovative Technology, Herndon, VA (US);
Virginia Polytechnic Institute and State University, Blacksburg, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07G / ; C08L / ;
U.S. Cl.
CPC ...
530502 ; 527400 ;
Abstract
A method of producing prepolymeric materials from lignin is disclosed. The method uses lignin which has been hydroxyalkyl modified, such that the lignin is substantially non-phenolic and solvent soluble and/or liquid. The modified lignin is reacted with materials which yield prepolymers which may be polymerized according to known methods to produce useful polymers.