Granted Patent
Utility
US 5,229,095 · App. 07/839,008
Process for producing amorphous sodium silicate
Inventors:
Gunther Schimmel, Michael Kotzian, Herbert Panter, Alexander Tapper
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Feb 14, 1992
Inventors
Gunther Schimmel
Michael Kotzian
Herbert Panter
Alexander Tapper
Assignee (at issue)
Hoechst GmbH
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.