Granted Patent
Utility
US 5,952,399 · App. 08/941,549
Polymerisable dental material and use of apatite fillers in the dental material
Inventor:
Harald Rentsch
Patented Case
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Granted: Sep 14, 1999
Filed: Sep 30, 1997
Inventor
Harald Rentsch
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.