Granted Patent
Utility
US 5,051,080 · App. 07/551,658
Parison lubrication apparatus
Inventors:
Gary R. Hill, Walter K. Schoch, Michael Warkentien
Patented Case
View Patent ↗
Granted: Sep 24, 1991
Filed: Jul 13, 1990
Inventors
Gary R. Hill
Walter K. Schoch
Michael Warkentien
Assignee (at issue)
Sewell Plastics, 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.