Granted Patent
Utility
US 5,124,143 · App. 07/281,948
Dentrifice
Inventors:
Hans R. Muhlemann, Karl-Hans Muller, Matthias Neumuller
Patented Case
View Patent ↗
Granted: Jun 23, 1992
Filed: Dec 7, 1988
Inventors
Hans R. Muhlemann
Karl-Hans Muller
Matthias Neumuller
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.