Granted Patent
Utility
US 4,380,424 · App. 06/268,036
Pellet die
Inventors:
Leroy V. Skoch, Keith E. Pike
Patented Case
View Patent ↗
Granted: Apr 19, 1983
Filed: May 28, 1981
Inventors
Leroy V. Skoch
Keith E. Pike
Assignee (at issue)
Ralston Purina 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.