Granted Patent
Utility
US 4,837,216 · App. 07/148,814
Agents against protozoa in insects
Inventors:
Heinz Mehlhorn, Gunter Schmahl
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Jan 27, 1988
Inventors
Heinz Mehlhorn
Gunter Schmahl
Assignee (at issue)
Bayer Aktiengesellschaft
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.