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:
Aug. 31, 1993
Filed:
May. 27, 1992
Applicant:
Inventors:
Dorothy L Roerden, Lake Jackson, TX (US);
Clara D Wessels, Angleton, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B / ;
U.S. Cl.
CPC ...
536 50 ;
Abstract
A process for dry cationization of starch or a starch-containing material comprises reacting the starch or starch-containing material with a dialkyl(epoxyalkyl)amine or trialkyl(epoxyalkyl) ammonium halide in a medium containing a maximum of 40% by weight of water in the presence of an alkali metal or alkaline earth metal oxide or hydroxide and a finely-divided aluminosilicate clay, having a cation-exchange capacity less than about 15 meq/100 g.