Granted Patent
Utility
US 5,767,313 · App. 08/652,239
Method for the preparation of urea
Inventor:
Kees Jonckers
Patented Case
View Patent ↗
Granted: Jun 16, 1998
Filed: May 23, 1996
Inventor
Kees Jonckers
Assignee (at issue)
DSM N.V.
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.