Granted Patent
Utility
US 4,409,211 · App. 06/356,531
Systemic control of insect infestations in animals by use of O,O-dimethyl-2,2,2-trichloro-2-(tetrahydropyranyl-2-oxy)ethylphosphonate
Inventor:
Ashley H. Freiberg
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Mar 15, 1982
Inventor
Ashley H. Freiberg
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.