Granted Patent
Utility
US 4,734,741 · App. 07/085,664
Particulate material cleaning apparatus
Inventors:
Paul M. Hanner, Gary B. Bertram
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Aug 13, 1987
Inventors
Paul M. Hanner
Gary B. Bertram
Assignee (at issue)
EASTMAN KODAK 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.