Granted Patent
Utility
US 6,579,980 · App. 09/946,558
Method for preparing melamine
Inventor:
Tjay T. Tjioe
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Sep 6, 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.