Granted Patent
Utility
US 4,250,132 · App. 06/044,076
Material and apparatus for extruding a crosslinked polyolefin product
Inventor:
Shirley Beach
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: May 31, 1979
Inventor
Shirley Beach
Assignee (at issue)
Phillips Cables Limited
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.