Granted Patent
Utility
US 4,950,310 · App. 07/281,805
Process for the preparation of crystalline sheet sodium silicates
Inventors:
Hans-Peter Rieck, Martin Schott, Willy Ott, Werner Gohla
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Dec 8, 1988
Inventors
Hans-Peter Rieck
Martin Schott
Willy Ott
Werner Gohla
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.