Granted Patent
Utility
US 6,543,753 · App. 09/976,498
Air diffuser membrane treated with biocide
Inventor:
Charles E. Tharp
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Oct 12, 2001
Inventor
Charles E. Tharp
Assignee (at issue)
Environmental Dynamics, 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.