Granted Patent
Utility
US 5,643,886 · App. 08/064,080
Avermectins and milbemycins to treat parasitic infestations in dogs
Inventor:
John D. Hood
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jan 7, 1994
Inventor
John D. Hood
Assignee (at issue)
Pfizer 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.