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. 15, 1997
Filed:
Apr. 03, 1996
Applicant:
Inventors:
Katsumasa Harada, Yamaguchi, JP;
Yoichi Imbe, Yamaguchi, JP;
Keigo Nishihira, Yamaguchi, JP;
Shuji Tanaka, Yamaguchi, JP;
Satoru Fujitsu, Yamaguchi, JP;
Ryoji Sugise, Yamaguchi, JP;
Koichi Kashiwagi, Yamaguchi, JP;
Toshihiko Sumida, Yamaguchi, JP;
Assignee:
Ube Industries, Ltd., Yamaguchi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558274 ;
Abstract
A diaryl carbonate is prepared at a high yield and a high selectivity by heating a diaryl oxalate in the presence of an organic phosphorous compound to release carbon monoxide therefrom. A halogen atom-containing compound can be employed in combination with the organic phosphorous compound.