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:
Feb. 24, 2015
Filed:
Apr. 25, 2007
Applicants:
Kunio Nakatsubo, Tokyo, JP;
Tatsuya Ogawa, Tokyo, JP;
Hitoshi Otomo, Tokyo, JP;
Midori Fujisaki, Tokyo, JP;
Inventors:
Kunio Nakatsubo, Tokyo, JP;
Tatsuya Ogawa, Tokyo, JP;
Hitoshi Otomo, Tokyo, JP;
Midori Fujisaki, Tokyo, JP;
Assignee:
Kyodo Printing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41M 5/20 (2006.01); G01N 31/22 (2006.01); G01N 21/81 (2006.01);
U.S. Cl.
CPC ...
G01N 31/222 (2013.01); G01N 21/81 (2013.01);
Abstract
Disclosed is a humidity indicator which contains no heavy metal and has good visibility of a color change that occurs when the humidity is increased. The humidity indicator can be produced by applying an aqueous coating comprising a leuco dye, an acidic compound which is in a solid state at ambient temperature, a deliquescent substance and an aqueous resin emulsion onto a substrate such as a resin film, a nonwoven fabric or a paper, and heating and drying the resulting product.