Granted Patent
Utility
US 5,352,371 · App. 08/021,885
Method and apparatus for repeatedly passing a fluid through a fluid treatment unit
Inventor:
Thomas J. Felt
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Feb 24, 1993
Inventor
Thomas J. Felt
Assignee (at issue)
Cobe Laboratories, 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.