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:
Sep. 04, 2001
Filed:
Jan. 11, 2001
Stephanie Andes, Maintal, DE;
Gerd Bauer, Kleinostheim, DE;
Günter Brenner, Griesheim, DE;
Dieter Brückner, Darmstadt, DE;
Michael Schmelz, Kriftel, DE;
Andrea Heyland, Ober-Kainsbach, DE;
Matthias Kuntz, Seeheim, DE;
Karl Osterried, Dieburg, DE;
Gerhard Pfaff, Münster, DE;
Merck Patent GmbH, Darmstadt, DE;
Abstract
Multilayer interference pigment consisting of plateletlike titanium dioxide as carrier material, coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by solidification and hydrolysis of an aqueous solution of a thermally hydrolysable titanium compound on a continuous belt, detachment of the resulting coat, coating of the resulting titanium dioxide platelets, with or without drying in between, by a wet method with, alternately, a metal oxide hydrate of high refractive index and a metal oxide hydrate of low refractive index by hydrolysis of the corresponding, water-soluble metal compounds, separation, drying and, if desired, calcining of the material obtained.