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:
Jul. 28, 2009
Filed:
Oct. 01, 2002
Akira Kishimoto, Nishitama-gun, JP;
Takafumi Atarashi, Nishitama-gun, JP;
Katsuto Nakatsuka, Sendai-shi, Miyagi 982-0252, JP;
Akira Kishimoto, Nishitama-gun, JP;
Takafumi Atarashi, Nishitama-gun, JP;
Katsuto Nakatsuka, Sendai-shi, Miyagi 982-0252, JP;
Nittetsu Mining Co., Ltd., Tokyo, JP;
Other;
Abstract
Optically coherent multilayered film-coated powder having weather resistance and a clear intended color, and processes for designing and producing the same are provided. A substance of the base particles providing an intended function and an intended color are selected; a spectral intensity curve and values in CIELAB color system of the intended color are measured; and with substances capable of being used as the coated layers and refractive indexes thereof being included in factors, substances and thicknesses of the coated layers and an order of formation of the layers are obtained that provide optically coherent multilayered film-coated powder having such values in CIELAB color system that minimizes a color difference and makes a hue ratio proximate to 1, by solving numerical solutions of the recurring formula for film multiple coherence.