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:
Nov. 02, 1976
Filed:
Feb. 22, 1974
Applicant:
Inventors:
Eiichi Yonemitsu, Kashiwa, JA;
Akitoshi Sugio, Tokyo, JA;
Tetsuo Tomita, Tokyo, JA;
Tadashi Yoshii, Tokyo, JA;
Akira Ito, Tokyo, JA;
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260 / ;
Abstract
Polyphenylene oxides, self-condensation products of phenols, are produced through oxidative coupling by employing a novel catalyst system which comprises a copper compound, an iodine compound and tertiary diamine which is capable of forming a stable chelate ring with the copper compound. According to this invention, copper compounds, which hitherto have been considered to be unsuitable for using with tertiary amines, act with excellent performance as a component of the catalyst.