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:
Sep. 05, 2000
Filed:
Oct. 06, 1998
Applicant:
Inventors:
Norikazu Iwasaki, Tochigi, JP;
Hisaya Tamura, Kanuma, JP;
Toyoji Yamazaki, Utsunomiya, JP;
Yukio Yamada, Kanuma, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219505 ; 219548 ; 219511 ; 361106 ;
Abstract
A PTC-element to be used as a protective device against overcurrent or overvoltage, of which the volume resistivity does not substantially differ before and after a high temperature processing, such as reflowing of solder, and can be preserved even after having been subjected to repeated tripping, which contains a non-conductive crystalline polymer and a particulate conductor material dispersed in the non-conducting crystalline polymer, wherein the particulate conductor material includes electro-conductive particles having irregular surface contours.