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:
Dec. 12, 1995
Filed:
Oct. 22, 1993
Applicant:
Inventors:
Fangchen Lee, Tachia Taichung, TW;
Tsung-Chung Liu, Tachia Taichung, TW;
Assignee:
Yung Shin Pharm. Ind. Co., Ltd., Tachia Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564414 ; 564433 ; 564434 ;
Abstract
This invention provides a novel process for the preparation of substituted derivatives of diphenyl amine. The special feature of this novel process is that low cost and recoverable phenolic salts are used as catalysts for molecular rearrangement and aminolysis to obtain substituted derivatives of diphenyl amine in high yield.