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:
Jul. 06, 2010
Filed:
Jul. 11, 2005
Applicants:
Yasuo Chikusa, Tatsuno, JP;
Hideaki Tamakoshi, Tatsuno, JP;
Inventors:
Yasuo Chikusa, Tatsuno, JP;
Hideaki Tamakoshi, Tatsuno, JP;
Assignee:
H. C. Starck GmbH, Goslar, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 228/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
The method for producing an aqueous dispersion containing a complex of poly(3,4-dialkoxythiophene) and a polyanion comprises: a process of polymerizing 3,4-dialkoxythiophene in the presence of a polyanion by using an oxidizing agent in an aqueous solvent, in which polystyrene-sulfonic acid having a specific molecular weight and a sulfonation degree or polystyrenesulfonic acid having another specific sulfonation degree is used as the polyanion, or in which pH of the reaction mixture during the reaction is set to a specific value.