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. 09, 1999
Filed:
Aug. 28, 1996
Applicant:
Inventor:
Tom J Hall, Arlington Heights, IL (US);
Assignee:
Littelfuse, Inc., Des Plaines, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01C / ;
U.S. Cl.
CPC ...
338 / ;
Abstract
Circuit protection devices comprising PTC elements and circuits containing such devices. The PTC element includes a crystalline conductive polymer composition comprising a conductive particulate filler grafted to a modified polyolefin. The modified polyolefin comprises a polyolefin having a carboxylic acid or a carboxylic acid derivative grafted thereto. The conductive particulate filler is grafted via an esterification reaction to the modified polyolefin.
Published as:
CA2233314A1; WO9712378A1; AU7371196A; JPH09111068A; EP0852801A1; MX9802374A; CN1202264A; US5864280A; US5880668A; KR19990063872A; EP0852801B1; ATE189078T1; DE69606316D1; US6059997A; DE69606316T2; TW405125B; BR9610686A; JP3179707B2; EP0852801B2; DE69606316T3; KR100452074B1;