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:
Jun. 17, 2003
Filed:
Feb. 25, 2000
Applicant:
Inventor:
Tom J. Hall, Arlington Heights, IL (US);
Assignee:
Littelfuse, Inc., Des Plaines, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/04 ;
U.S. Cl.
CPC ...
C08K 3/04 ;
Abstract
Positive temperature coefficient (“PTC”) materials for use in electronic components for the protection of electrical circuits. Through the use of an organo-metallic coupling agent, the room temperature resistivity of polymeric PTC materials may be reduced. The PTC materials of the present invention include a polyolefin, a conductive filler and an organo-metallic coupling agent, and have an electrical resistivity at 25° C. of less than 1 ohm cm.