Granted Patent
Utility
US 6,548,669 · App. 09/828,999
Method for preparing melamine
Inventor:
Tjay T. Tjioe
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Apr 10, 2001
Inventor
Tjay T. Tjioe
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.