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:
Jun. 20, 1989
Filed:
Mar. 16, 1987
Applicant:
Inventors:
Takao Iwasaki, Iwaki, JP;
Katsumi Horikosi, Iwaki, JP;
Assignee:
Kureha Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
528388 ; 422240 ;
Abstract
By the use of an apparatus for producing a polyarylenesulfide comprising a dehydrator vessel and/or a reactor vessel wherein at least liquid-contacting parts thereof are fabricated of titanium, a clean polyarylenesulfide containing no foreign matter can be obtained by reacting a hydrous alkali metal sulfide with a dihaloaromatic compound in an aprotic polar organic solvent.