Granted Patent
Utility
US 4,948,013 · App. 07/339,055
Method and apparatus for dispensing powdered pesticide
Inventors:
John E. Thomas, Haresh C. Lakhan
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Apr 14, 1989
Inventors
John E. Thomas
Haresh C. Lakhan
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.