Granted Patent
Utility
US 5,304,000 · App. 08/098,134
Methods of constructing paddle and shaft assemblies for twin screw mixer and/or processors and the resulting apparatus
Inventors:
James E. Kowalczyk, Bernard A. Loomans
Patented Case
View Patent ↗
Granted: Apr 19, 1994
Filed: Jul 28, 1993
Inventors
James E. Kowalczyk
Bernard A. Loomans
Assignee (at issue)
APV Chemical Machinery 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.