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:
Aug. 30, 1983
Filed:
Jul. 01, 1982
Applicant:
Inventors:
Dieter Ferchland, Kelkheim, DE;
Ulrich Kussmaul, Niederdorfelden, DE;
Manfred Langer, Frankfurt am Main, DE;
Rolf Muller, Karben, DE;
Assignee:
Cassella Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605432 ; 564218 ;
Abstract
An improved process for preparation of arylisocyanide dichloride by chlorinating N-arylformamide in the presence of thionyl chloride wherein the improvement comprises preparing the N-arylformamide by formylation of an arylamine having 6 to 12 aryl carbon atoms with a formylating agent in an inert solvent.