Granted Patent
Utility
US 5,550,286 · App. 08/354,206
Process for the preparation of aromatic carboxamides from aromatic carboxylic acids and urea
Inventors:
Yani Christidis, Michael Meier
Patented Case
View Patent ↗
Granted: Aug 27, 1996
Filed: Dec 12, 1994
Inventors
Yani Christidis
Michael Meier
Assignee (at issue)
Hoechst GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.