Granted Patent
Utility
US 4,947,578 · App. 07/368,042
Controlled release system for insect attractant
Inventors:
Douglas G. Anderson, Keith D. Lokkesmoe
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Jun 16, 1989
Inventors
Douglas G. Anderson
Keith D. Lokkesmoe
Assignee (at issue)
ECOLAB 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.