Granted Patent
Utility
US 5,188,787 · App. 07/913,961
Process for the injection moulding of multi-layered articles
Inventors:
David C. King, Rupert Martin Lillis, George White
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Jul 17, 1992
Inventors
David C. King
Rupert Martin Lillis
George White
Assignee (at issue)
DuPont Canada 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.