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:
Jan. 13, 1976
Filed:
Nov. 01, 1974
Applicant:
Inventor:
Karl David Sears, Shelton, WA (US);
Assignee:
International Telephone and Telegraph Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604735 ; 260124 ; 252-85 ;
Abstract
Polyphenolic extracts of coniferous tree barks and condensed tannins from wood such as quebracho extracts are etherified by reaction at elevated temperature in the presence of an alkaline catalyst with an olefin containing a double bond-activated carbonyl group having the structure ##EQU1## A particularly effective olefin is acrolein. The reaction products are produced in high yield, are water or alkali soluble and act among other uses as good dispersants.