Granted Patent
Utility
US 6,835,834 · App. 10/210,877
Process for preparing melamine from urea
Inventors:
Nora Anna De Wit, Rob Kasimier Gulpers
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: Aug 2, 2002
Inventors
Nora Anna De Wit
Rob Kasimier Gulpers
Assignee (at issue)
DSM IP Assets B.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.