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:
Mar. 15, 2005
Filed:
May. 21, 2001
Applicants:
Andreas Wölfert, Bad Rappenau, DE;
Ulrich Penzel, Tettau, DE;
Inventors:
Andreas Wölfert, Bad Rappenau, DE;
Ulrich Penzel, Tettau, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C263/00 ;
U.S. Cl.
CPC ...
Abstract
Starting material streams are mixed in a mixer () for the phosgenation of amines by a process in which the reaction product () is removed in a closed loop and the starting material streams () contain organic solvents. The main streams () and/or part-streams () of the starting materials () come into contact with one another according to the countercurrent principle.