Granted Patent
Utility
US 6,537,442 · App. 09/720,852
Cogel containing oxidic compounds of tetravalent, trivalent, and divalent metallic elements
Inventors:
Jan Nieman, Stephan Janbroers
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Feb 20, 2001
Inventors
Jan Nieman
Stephan Janbroers
Assignee (at issue)
AKZO NOBEL 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.