Granted Patent
Utility
US 6,331,351 · App. 09/401,594
Chemically active filter material
Inventors:
Michelle Waters, Marc Plinke
Patented Case
View Patent ↗
Granted: Dec 18, 2001
Filed: Sep 22, 1999
Inventors
Michelle Waters
Marc Plinke
Assignee (at issue)
Gore Enterprise Holdings, 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.