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:
Jan. 03, 2017
Filed:
Dec. 21, 2012
Kao Corporation, Chuo-ku, JP;
Takeshi Oka, Funabashi, JP;
KAO CORPORATION, Chuo-ku, JP;
Abstract
A heating element () comprises an exothermic layer () containing an oxidizable metal, a water absorption agent and water and a water-retention layer () having a water absorption sheet (), the exothermic layer () and the water-retention layer () are in layers, in which the mass ratio of the content of the water absorption agent is from 0.3 to 20 parts by mass for 100 parts by mass of the oxidizable metal, mass ratio of content of water to the content of the water absorption agent in the exothermic layer () (water/water absorption agent) is from 0.8 to 13, and the content of water contained in the water-retention layer () is from 10 to 45 mass % of the maximum water absorption of said water-retention layer ().