Granted Patent
Utility
US 4,591,275 · App. 06/620,907
Apparatus for mixing pulverulent material on a conveyor belt
Inventor:
Donald R. Garthus
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: Jun 15, 1984
Inventor
Donald R. Garthus
Assignee (at issue)
The Interlake Companies, 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.