Granted Patent
Utility
US 6,809,149 · App. 09/982,006
Functionalized silicas
Inventors:
Jurgen Meyer, Manfred Ettlinger, Stephanie Frahn, Dieter Kerner
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: Oct 19, 2001
Inventors
Jurgen Meyer
Manfred Ettlinger
Stephanie Frahn
Dieter Kerner
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.