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. 10, 1998
Filed:
Jun. 21, 1996
Applicant:
Inventors:
Shizuo Furuyama, Osaka, JP;
Nobuharu Tsukiji, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01C / ;
U.S. Cl.
CPC ...
338 35 ;
Abstract
A dew sensor used in a video tape recorder, and the like, can be mounted on a printed circuit board remote from the cylinder. A pair of electrodes are formed on an insulated substrate, a moisture sensing material is disposed on the insulated substrate containing the pair of electrodes, and conductive powder is dispersed therein. The moisture sensing material is produced by reaction of a moisture absorbing resin having a hydrophilic group and an epoxy group, and a hardener containing a hydrazine derivative having a hydantoin skeleton, and, optionally, a long chain diamine compound.