Granted Patent
Utility
US 6,447,793 · App. 09/396,949
Water soluble, broad spectrum preservative system
Inventors:
Duncan Aust, Stephen Spiegelman, Michael A. Ross
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Sep 15, 1999
Inventors
Duncan Aust
Stephen Spiegelman
Michael A. Ross
Assignee (at issue)
The Collaborative Group, Ltd.
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.