Granted Patent
Utility
US 4,291,509 · App. 06/087,060
Guard housing and liner for bladed centrifugal blasting wheels
Inventors:
Harold F. Schulte, Raymond M. Leliaert, Robert D. Rohr
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Oct 22, 1979
Inventors
Harold F. Schulte
Raymond M. Leliaert
Robert D. Rohr
Assignee (at issue)
Wheelabrator-Frye 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.