Granted Patent
Utility
US 4,950,757 · App. 07/393,164
Process for manufacture of melamine pyrophosphate
Inventors:
John Tomko, Alan M. Aaronson
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Aug 14, 1989
Inventors
John Tomko
Alan M. Aaronson
Assignee (at issue)
Akzo America Inc.
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.