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:
Nov. 30, 1999
Filed:
Jul. 02, 1998
Applicant:
Inventors:
Michael P Diebold, Wilmington, DE (US);
Charles Robert Bettler, Newark, DE (US);
Phillip Martin Niedenzu, New Johnsonville, TN (US);
Anhtony John Coombe, McEwen, TN (US);
John Phillip Lanci, Sr, Long Beach, MS (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
106442 ; 106446 ;
Abstract
A process is provided to prepare durable, high gloss titanium dioxide pigments by a continuous wet treatment process which involves curing of a silica coating at pH of between 7.0 and 8.5. Pigment prepared in this fashion is substantially free from Al(OH).sub.3 impurities and has excellent performance properties in high quality latex paint formulations.