Granted Patent
Utility
US 5,772,896 · App. 08/628,405
Self-regulating water purification composition
Inventors:
Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Apr 5, 1996
Inventors
Raymond P. Denkewicz, Jr.
John D. Rafter
Mark A. Bollinger
Assignee (at issue)
Fountainhead 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.