Granted Patent
Utility
US 5,817,270 · App. 08/716,401
Method and device for manufacturing biaxially oriented tubing from thermoplastic material
Inventors:
Jan Hendrik Prenger, Johan Schuurman, Jan Visscher
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Nov 22, 1996
Inventors
Jan Hendrik Prenger
Johan Schuurman
Jan Visscher
Assignee (at issue)
Wavin B.V.
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.