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:
Apr. 04, 2023
Filed:
Jul. 23, 2021
Applicant:
Littelfuse, Inc., Chicago, IL (US);
Inventors:
Jianhua Chen, Chicago, IL (US);
Davide Faganello, Chicago, IL (US);
Assignee:
Littelfuse, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01C 7/02 (2006.01); H01C 1/14 (2006.01); H01B 1/04 (2006.01); H01C 17/065 (2006.01);
U.S. Cl.
CPC ...
H01C 7/027 (2013.01); H01B 1/04 (2013.01); H01C 1/1406 (2013.01); H01C 17/06586 (2013.01);
Abstract
A polymeric positive temperature coefficient (PPTC) tank heater features a first conductive region, a heater body, and a second conductive region, forming a sandwich. The first conductive region includes a first conductive surface connected to a first lead and a second conductive surface connected to a second lead. The heater body is a PPTC polymer matrix including a conductive filler and a semi-crystalline polymer. The sandwich includes multiple heating elements connected in series and each heating element supplies a different resistance.