Granted Patent
Utility
US 4,918,974 · App. 07/307,318
Method and apparatus for the measurement of the thermal conductivity of gases
Inventors:
Raynald Hachey, Daniel Lamarre, Jacques Marcotte
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Feb 6, 1989
Inventors
Raynald Hachey
Daniel Lamarre
Jacques Marcotte
Assignee (at issue)
Alcan International 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.