Granted Patent
Utility
US 5,351,887 · App. 08/019,161
Pumping and spraying system for heavy materials
Inventors:
Robert D. Heterington, James E. Cavanaugh, Gary D. Cavanaugh
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Feb 16, 1993
Inventors
Robert D. Heterington
James E. Cavanaugh
Gary D. Cavanaugh
Assignee (at issue)
Binks Manufacturing Company
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.