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. 26, 1998
Filed:
Mar. 27, 1996
Applicant:
Inventors:
Masato Yanagi, Tokyo, JP;
Makoto Dohi, Tokyo, JP;
Hideyuki Ishiguro, Tokyo, JP;
Keiichi Sato, Tokyo, JP;
Assignee:
Toyo Ink Manufacturing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01K / ;
U.S. Cl.
CPC ...
436-7 ; 436-1 ; 436-2 ; 436164 ; 422 56 ; 422 57 ; 422 61 ; 422119 ; 116206 ; 374106 ;
Abstract
A method of indicating a time or a temperature-time accumulated value as a color change (degree of color development), which comprises providing an oxidation-polymerizable dyestuff and the oxidizing agent in a non-contact state and bringing the oxidation-polymerizable dyestuff and the oxidizing agent into contact with each other to polymerize the oxidation-polymerizable dyestuff with the passage of time, and an indicator material therefor.