Granted Patent
Utility
US 4,812,308 · App. 07/017,143
Hydrogen peroxide-releasing tooth powder
Inventors:
Anthony E. Winston, Herman L. Marder, Wayne R. Sorenson
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Feb 20, 1987
Inventors
Anthony E. Winston
Herman L. Marder
Wayne R. Sorenson
Assignee (at issue)
Church & Dwight Co., Inc.
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.