Granted Patent
Utility
US 6,540,922 · App. 09/214,398
Method and device for treating a liquid medium
Inventors:
Eric De Meulenaer Cordemans, Baudouin Hannecart, Marie-Françoise Lepeltier, Yves Canivet
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Aug 27, 1999
Inventors
Eric De Meulenaer Cordemans
Baudouin Hannecart
Marie-Françoise Lepeltier
Yves Canivet
Assignee (at issue)
Ashland, 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.