Granted Patent
Utility
US 4,234,568 · App. 06/025,440
Method and composition for inhibiting plaque
Inventors:
Frances C. Benkwitt, Fawzy G. Sherif
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Mar 30, 1979
Inventors
Frances C. Benkwitt
Fawzy G. Sherif
Assignee (at issue)
Stauffer Chemical Company
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.