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. 03, 1992
Filed:
Feb. 14, 1991
Applicant:
Inventors:
Peter H van Konynenburg, Palo Alto, CA (US);
Andrew Au, Fremont, CA (US);
Assignee:
Raychem Corporation, Menlo Park, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01G / ;
U.S. Cl.
CPC ...
392451 ; 392485 ; 219206 ; 219505 ; 219552 ; 338 / ; 123557 ;
Abstract
Conductive polymer compositions based on polyvinylidene fluoride have improved properties when the polyvinylidene fluoride has a very regular structure which can be characterized by a low head-to-head content in the repeating units. The improved properties include electrical stability when contacted by organic fluids and/or when maintained at elevated temperatures in air. Such compositions which exhibit PTC behavior are particularly useful in the form of self-limiting heaters which are immersed in organic fluds, especially flexible strip heaters for heating diesel fuel before it passes through a fuel filter.