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:
Nov. 12, 2002
Filed:
Apr. 19, 1999
Applicant:
Inventors:
Fu-Hua Chu, Taipei, TW;
Yun-Ching Ma, Jun-Ho, TW;
Assignee:
Polytronics Technology Corporation, Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/04 ;
U.S. Cl.
CPC ...
C08K 3/04 ;
Abstract
Conductive polymer blend composites exhibiting PTC (positive temperature coefficient of resistance) behavior, comprising at least two types of polymers and preferably at least two types of conductive particulate materials (e.g., carbon blacks), and electrical devices containing such composites. The two polymers are selected to have different melt flow index values, while the two particulate materials are selected to have different average particle sizes and DBP values.