Granted Patent
Utility
US 5,180,225 · App. 07/711,927
Rotor zone cooling apparatus for rotors in continuous mixers of plastic materials
Inventors:
Joseph R. Piccolo, Sr., William H. Swilling, Jr., Michael R. Kearney, Douglas E. Mosher
Patented Case
View Patent ↗
Granted: Jan 19, 1993
Filed: Jun 7, 1991
Inventors
Joseph R. Piccolo, Sr.
William H. Swilling, Jr.
Michael R. Kearney
Douglas E. Mosher
Assignee (at issue)
Farrel Corporation
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.