Granted Patent
Utility
US 4,828,823 · App. 06/848,861
Dicalcium phosphate dihydrate for fluoride dentifrice compositions
Inventor:
Rosa Li
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Apr 7, 1986
Inventor
Rosa Li
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.