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:
Sep. 28, 1999
Filed:
Feb. 28, 1997
Atsushi Kobayashi, Tokyo, JP;
Takashi Fukaumi, Tokyo, JP;
Kosuke Amano, Tokyo, JP;
Hitoshi Ishikawa, Tokyo, JP;
Masaharu Satoh, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A heat resistant derivative conductive polymer containing nitrogen atoms exclusively in units of polyaniline or a derivative thereof contains a sulfonic acid compound as a dopant, and the percentage of sulfonic acid groups per recurring unit of the polyaniline or derivative thereof is set to 28 to 40%. Also, a solid electrolytic capacitor uses a solid electrolyte of polyaniline or derivative thereof containing a sulfonic acid compound as a dopant, wherein the percentage of sulfonic acid groups per recurring unit of polyaniline or derivative thereof is set to 28 to 40%. In this selected range of the concentration of the dopant, the conductivity and the pyrolysis commencement temperature characteristics are excellent.