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:
May. 10, 2005
Filed:
Jun. 14, 1999
Applicants:
Armin Stamm, Mainz, DE;
Jochem Henkelmann, Mannheim, DE;
Inventors:
Armin Stamm, Mainz, DE;
Jochem Henkelmann, Mannheim, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D403/04 ;
U.S. Cl.
CPC ...
Abstract
In a process for preparing carbonyldiimidazole from imidazole and phosgene in an inert solvent, the imidazole hydrochloride which results as coupled product is removed as melt from the resulting reaction mixture by phase separation.