Granted Patent
Utility
US 5,401,403 · App. 08/123,896
Membrane module and a method for its manufacture
Inventor:
Peter Hagqvist
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Sep 20, 1993
Inventor
Peter Hagqvist
Assignee (at issue)
AB Electrolux
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.