Granted Patent
Utility
US 5,296,217 · App. 07/898,290
Methods for preventing dental calculus in domestic animals
Inventor:
George K. Stookey
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: Jun 15, 1992
Inventor
George K. Stookey
Assignee (at issue)
THE TRUSTEES OF INDIANA UNIVERSITY
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.