Granted Patent
Utility
US 5,674,439 · App. 08/518,535
System and apparatus for injection molding articles of amorphous polyethylene terephthalate and similar materials
Inventors:
William J. Hume, Paul M. Swenson
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Aug 23, 1995
Inventors
William J. Hume
Paul M. Swenson
Assignee (at issue)
KONA 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.