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. 07, 1991
Filed:
Feb. 22, 1990
Applicant:
Inventor:
Peter Dilling, Isle of Palms, SC (US);
Assignee:
Westvaco Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08H / ;
U.S. Cl.
CPC ...
530500 ; 530501 ;
Abstract
A method of producing a sulfated lignin comprising the steps of dissolving lignin in an aqueous alkaline solution, adding an organic amine-sulfur trioxide complex to the dissolved lignin, and reacting the amine-sulfur trioxide complex with the lignin under conditions to sulfate the same.