Granted Patent
Utility
US 4,408,972 · App. 06/349,575
Centrifugal pelletizers
Inventor:
James Layfield
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Feb 17, 1982
Inventor
James Layfield
Assignee (at issue)
Baker Perkins 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.