Granted Patent
Utility
US 6,136,838 · App. 09/271,092
Sulfurpentafluorophenylpyrazoles for controlling ectoparasitic infestations
Inventors:
Rey T. Chern, Jeffrey N. Clark, Marlene D. Drag, Joel R. Zingerman
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Mar 18, 1999
Inventors
Rey T. Chern
Jeffrey N. Clark
Marlene D. Drag
Joel R. Zingerman
Assignee (at issue)
MERCK & CO., 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.