Granted Patent
Utility
US 5,000,933 · App. 07/472,980
Process for hydrothermal production of sodium silicate solutions
Inventors:
Rudolf Novotny, Alfred Hoff, Jost Schuertz
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Jan 31, 1990
Inventors
Rudolf Novotny
Alfred Hoff
Jost Schuertz
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.