Granted Patent
Utility
US 4,540,576 · App. 06/573,530
Neutral topical sodium fluoride gel
Inventor:
Robert T. Zahradnik
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Jan 24, 1984
Inventor
Robert T. Zahradnik
Assignee (at issue)
Johnson & Johnson Dental Products 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.