Granted Patent
Utility
US 6,497,508 · App. 09/882,948
Plasticating process, apparatus and screw with mixing
Inventors:
Timothy W. Womer, Walter S. Smith, Rosalyn M. Thompson
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Jun 15, 2001
Inventors
Timothy W. Womer
Walter S. Smith
Rosalyn M. Thompson
Assignee (at issue)
New Castle Industries, 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.