Granted Patent
Utility
US 6,709,694 · App. 09/890,690
Coloring ceramics by way of ionic or complex-containing solutions
Inventors:
Daniel Suttor, Holger Hauptmann, Robert Schnagl, Sybille Frank
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Sep 26, 2001
Inventors
Daniel Suttor
Holger Hauptmann
Robert Schnagl
Sybille Frank
Assignee (at issue)
3M ESPE AG
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.