Granted Patent
Utility
US 4,753,791 · App. 07/003,166
Dental-care composition using precipitated silica
Inventors:
Karl-Hans Muller, Matthias Neumuller, Gunther Turk
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Jan 13, 1987
Inventors
Karl-Hans Muller
Matthias Neumuller
Gunther Turk
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.