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:
Mar. 08, 2005
Filed:
Apr. 18, 2001
Applicants:
Hisao Yamada, Shizuoka-ken, JP;
Mitsuyuki Tsurumi, Shizuoka-ken, JP;
Kazunori Nigorikawa, Shizuoka-ken, JP;
Inventors:
Hisao Yamada, Shizuoka-ken, JP;
Mitsuyuki Tsurumi, Shizuoka-ken, JP;
Kazunori Nigorikawa, Shizuoka-ken, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F007/021 ;
U.S. Cl.
CPC ...
Abstract
The present invention provides a method for forming an azo colorant by reaction of a diazo compound and a coupler. The coupler has a leaving group at the coupling position thereof, such that a coupling reaction rate is faster than it would be if the coupler did not have the leaving group. The coupling reaction rate constant k is preferably 0.1 (s) or more.