Granted Patent
Utility
US 5,928,518 · App. 08/851,025
Cross-flow filtration process for separating organic compound by adsorption on inorganic solids
Inventors:
Wiltrud Schafer-Treffenfeldt, Stefan Stockhammer, Gerard Richet, Gunter Weissland
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: May 5, 1997
Inventors
Wiltrud Schafer-Treffenfeldt
Stefan Stockhammer
Gerard Richet
Gunter Weissland
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.