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:
Jan. 02, 2007
Filed:
Sep. 14, 2005
Jin-eok Kim, Daejeon, KR;
Jong-cheon Park, Seoul, KR;
Kil-sun Lee, Daejeon, KR;
Jung-hee Jang, Gwangju, KR;
Jin-eok Kim, Daejeon, KR;
Jong-cheon Park, Seoul, KR;
Kil-sun Lee, Daejeon, KR;
Jung-hee Jang, Gwangju, KR;
Korea Kumho Petrochemical Co., Ltd., Seoul, KR;
Abstract
4-aminodiphenylamine is prepared by reacting carbanilide and nitrobenzene in an adequate solvent, which may be nitrobenzene, in the presence of an appropriate organic base, which may be tetramethylammonium hydroxide, alone or in mixture with an inorganic base and subsequently reducing the reaction product in the presence of an appropriate catalyst and hydrogen gas. The subsequent reduction may be carried out on the reaction mixture before the reaction mixture is subjected to separation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile