Granted Patent
Utility
US 6,632,853 · App. 09/938,832
Dental composites containing hybrid fillers and process for their production
Inventors:
Jochen Alkemper, Joachim Binder, Harald Rentsch, Hans-Joachim Ritzhaupt-Kleissl, Jurgen Hausselt
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Aug 27, 2001
Inventors
Jochen Alkemper
Joachim Binder
Harald Rentsch
Hans-Joachim Ritzhaupt-Kleissl
Jurgen Hausselt
Assignees (at issue)
Degussa AG
Forschungszentrum Karlsruhe 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.