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. 21, 2006
Filed:
Feb. 27, 2002
Yong-in Lee, Seoul, KR;
Hyun-nam Cho, Seoul, KR;
Jong-hawk Kim, Seoul, KR;
Shinwha Intertek Corporation, Kyonggi-do, KR;
Abstract
The present invention relates to a conductive polymer composition having PTC properties, that is, a PTC composition, and a PTC device comprised thereof, in particular, it relates to a PTC composition and a PTC device comprising thereof, wherein the PTC composition comprises: a) at least one crystalline thermoplastic olefin-based polymer and at least one rubber-based polymer resin containing unsaturated group; and b) conductive particles dispersed in a polymer matrix formed of component a). The PTC device comprising the PTC composition makes it possible to construct circuit protecting devices which can stably maintain their initial resistance value in spite of repeated current cycling by short-circuit.