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. 19, 2002
Filed:
Sep. 29, 2000
Takumi Miyazaki, Kitakyushu, JP;
Hirokazu Tanaka, Kitakyushu, JP;
Catalysts & Chemicals Industries Co., Ltd., Kawasaki, JP;
Abstract
An inorganic composite powder is formed of a scaled substrate, and at least three inorganic oxide layers having different refractive indexes respectively and sequentially laminated in an order of high refractive index to low refractive index from a surface of the scaled substrate to an utmost outer layer. A refractive index of an inorganic oxide used for forming the utmost outer layer is 1.73 or less, and a difference in the refractive indexes between the utmost layer and a layer adjacent thereto is 0.6 or less. Alternatively, the thickness of at least one of a second or higher inorganic oxide layer is within ±20% of a value d given by an equation: d=(&lgr;×X/4)/n, wherein &lgr; indicates a wavelength of visual light, X indicates an odd integer, and n indicates the refractive index of the inorganic oxide.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile