Granted Patent
Utility
US 5,389,402 · App. 08/059,582
Method of producing decorations which are color-stable in a porcelain firing and a pigment composition suitable therefor
Inventors:
Dietrich Speer, Akos Kiss, Jenny Horst, Guenter Halbritter, Rita Loew
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: May 12, 1993
Inventors
Dietrich Speer
Akos Kiss
Jenny Horst
Guenter Halbritter
Rita Loew
Assignee (at issue)
Degussa 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.