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. 23, 2002
Filed:
Jul. 16, 1999
Mizue Fukushima, Tokorozawa, JP;
Hiroshi Hirashima, Tokyo, JP;
Hiroaki Imai, Yokohama, JP;
Oh Junrok, Kawasaki, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A light-storing fluorescent pigment comprising a mother crystal and a rare earth element with which said mother crystal is doped, characterized in that said light-storing fluorescent pigment is produced by calcining a gel powder, as a starting material, obtained from an arbitrary combination of an alkoxide derivative, an organic acid salt, an inorganic acid salt, an oxide and a chloride of metal elements constituting said pigment by using a sol-gel method. A simplified production process can be used and the resulting light-storing fluorescent pigment has high crystal purity, is free from contamination with impurities and it is possible to easily control the particle diameter of the pigment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile