Granted Patent
Utility
US 5,576,199 · App. 08/323,198
Process for production of B avermectins
Inventors:
Edmund W. Hafner, Kelvin S. Holdom, S. Edward Lee
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Oct 14, 1994
Inventors
Edmund W. Hafner
Kelvin S. Holdom
S. Edward Lee
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.