Granted Patent
Utility
US 6,540,955 · App. 09/636,645
Process of making a socket on a pipe of thermoplastic material
Inventors:
William George Hutchinson, Hans Boer
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Aug 7, 2000
Inventors
William George Hutchinson
Hans Boer
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.