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:
May. 27, 2003
Filed:
Nov. 16, 2000
Applicant:
Inventors:
Koichi Noguchi, Chiba, JP;
Takayoshi Tanaka, Chiba, JP;
Kiichiro Morita, Saitama, JP;
Yasuhisa Ikeda, Saitama, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D 1/102 ; C08K 3/22 ; C08L 2/504 ; C08L 9/02 ; C08L 3/308 ; C08L 3/900 ; C08L 7/504 ; C08L 8/300 ;
U.S. Cl.
CPC ...
C09D 1/102 ; C08K 3/22 ; C08L 2/504 ; C08L 9/02 ; C08L 3/308 ; C08L 3/900 ; C08L 7/504 ; C08L 8/300 ;
Abstract
A reversibly discoloring ink composition which changes color reversibly and instantly in response to irradiation with light of a given wavelength distribution. The discoloring composition has fine particles comprised of one or more rare earth oxides represented by the general formula M O , wherein M is Ho, Nd, or Pr, and a light-transmissive base material having the fine particles dispersed therein. In an embodiment, a color changing decorative layer formed of the reversibly discoloring ink is printed on the upper layer of a dial plate or other wristwatch part.