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:
Dec. 16, 1997
Filed:
Aug. 29, 1994
Applicant:
Inventors:
Hans-Dieter Bruckner, Darmstadt, DE;
Ulrike Hamann, Darmstadt, DE;
Andrea Heyland, Reichelsheim, DE;
Assignee:
Merck Patent Gesellschaft Mit Beschrankter Haftung, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; B01J / ;
U.S. Cl.
CPC ...
424401 ; 2523131 ; 252314 ; 2523635 ; 423610 ; 423612 ; 424 59 ; 424 709 ;
Abstract
The present invention relates to neutral titanium dioxide sols which have been stabilized with hydroxycarboxylic acids or derivatives thereof and are treated with metal ions, inorganic anions, complexing agents and/or oxidizing agents to improve the photostability.