Patents by Inventor Tamio Aikawa

Tamio Aikawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

Platelet-like pigments coating with an optional first layer of barium or calcium sulfate and a layer of titanium and zirconium dioxide, which prevent transmission of ultraviolet and infrared rays

Patent number: 5271770

Abstract: A pigment comprising leaf-like substrates particles having a particle size of 0.5 to 100 .mu.m, whereby the surface of said particles is covered with a metal oxide comprising titanium oxide and zirconium oxide in a molar ratio of 10:1 to 10:15 within a range of from 20 wt. % to 60 wt. % based on the total weight of the pigment possesses good adhesion and spreadability and has an effect of preventing ultraviolet rays and infrared rays.

Type: Grant

Filed: September 29, 1992

Date of Patent: December 21, 1993

Assignee: Merck Patent Gesellschaft mit beschrankter Haftung

Inventors: Tamio Noguchi, Tamio Aikawa

Platelet-like pigments coating with an optional first layer of barium or calcium sulfate and a layer of titanium and zirconium dioxide, which prevent transmission of ultraviolet and infrared rays