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:
Apr. 10, 2007
Filed:
Apr. 07, 2006
Joachim Zechlin, Neuss, DE;
Kai Verkerk, Hilden, DE;
Dietmar Wastian, Dormagen, DE;
Katrin Joschek, Cologne, DE;
Tim Loddenkemper, Dormagen, DE;
Wilfried Pinke, Dormagen, DE;
Michael Schelhaas, Cologne, DE;
Georg Ronge, Dusseldorf, DE;
Joachim Zechlin, Neuss, DE;
Kai Verkerk, Hilden, DE;
Dietmar Wastian, Dormagen, DE;
Katrin Joschek, Cologne, DE;
Tim Loddenkemper, Dormagen, DE;
Wilfried Pinke, Dormagen, DE;
Michael Schelhaas, Cologne, DE;
Georg Ronge, Dusseldorf, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid.