Granted Patent
Utility
US 6,676,993 · App. 09/773,315
Porous membrane structure and method
Inventor:
Robert John Klare
Patented Case
View Patent ↗
Granted: Jan 13, 2004
Filed: Jan 31, 2001
Inventor
Robert John Klare
Assignee (at issue)
BHA Technologies, 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.