Granted Patent
Utility
US 5,382,089 · App. 07/711,805
Convenient access for clean-out and maintenance of mixing chamber and both rotors in two-rotor continuous mixers for plastic materials
Inventor:
Douglas E. Mosher
Patented Case
View Patent ↗
Granted: Jan 17, 1995
Filed: Jun 7, 1991
Inventor
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.