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:
Nov. 15, 2011
Filed:
Dec. 31, 2008
Applicants:
Hatem Abdallah Belfadhel, Roosendaal, NL;
Hans-peter Brack, Herrliberg, CH;
Ricardo Godoy-lopez, Terneuzen, NL;
Dennis James Patrick Maria Willemse, Standdaarbuiten, NL;
Inventors:
Hatem Abdallah Belfadhel, Roosendaal, NL;
Hans-Peter Brack, Herrliberg, CH;
Ricardo Godoy-Lopez, Terneuzen, NL;
Dennis James Patrick Maria Willemse, Standdaarbuiten, NL;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 261/00 (2006.01); C07C 275/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl carbonate to form an activated carbamate which can be further derivitized to form non-activated carbamate or a urea. The urea or carbamate can be subjected to a pyrolysis reaction to form isocyanate.