Granted Patent
Utility
US 5,141,580 · App. 07/618,391
Connection component for together plastic elements by thermal welding
Inventors:
Denis Dufour, Francois Fortin
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Nov 27, 1990
Inventors
Denis Dufour
Francois Fortin
Assignee (at issue)
Gaz de France
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.