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. 04, 1989
Filed:
Apr. 24, 1987
Applicant:
Inventors:
Burghard Gruning, Essen, DE;
Ulrich Holtschmidt, Essen, DE;
Gotz Koerner, Essen, DE;
Gerd Rossmy, Haltern-Lavesum, DE;
Assignee:
Th. Goldschmidt AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B32B / ;
U.S. Cl.
CPC ...
428405 ; 106481 ; 106482 ; 106490 ; 2523152 ; 252321 ; 252325 ; 252358 ; 427220 ; 428446 ; 428447 ;
Abstract
Silicic acid or silica particles having initially surface-located hydroxyl groups are modified by replacing at least partially the hydroxyl groups by an organic group to impart the particles with emulsion-breaking and foam-destroying properties. Processes for preparing the modified particles are also disclosed.