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:
Aug. 04, 2015
Filed:
Oct. 18, 2011
Yoshihiro Ichinose, Tokyo, JP;
Masanori Kobayashi, Tokyo, JP;
Takayuki Kimura, Tokyo, JP;
Koichi Suzuki, Tokyo, JP;
Yoshihiro Ichinose, Tokyo, JP;
Masanori Kobayashi, Tokyo, JP;
Takayuki Kimura, Tokyo, JP;
Koichi Suzuki, Tokyo, JP;
KUREHA CORPORATION, Tokyo, JP;
Abstract
A production process of a poly(arylene sulfide), including (a) a polymerization step of polymerizing at least one sulfur source selected from the group consisting of alkali metal sulfides and alkali metal hydrosulfides and a dihalo-aromatic compound in an organic amide solvent to form a polymer; (b) a separation step of separating the polymer from a liquid reaction mixture containing the polymer formed after the polymerization step; (c) a washing step of washing the polymer with at least one washing liquid selected from the group consisting of water, an organic solvent and a mixed solution of water and an organic solvent as desired; and (d) an aqueous oxidizing solution treatment step of treating the polymer by bringing the polymer into contact with an aqueous oxidizing solution.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile