Granted Patent
Utility
US 6,764,543 · App. 10/411,837
Mixture of silica sols
Inventors:
Peter Greenwood, Hans Bergqvist, Ulf Skarp
Patented Case
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Granted: Jul 20, 2004
Filed: Apr 11, 2003
Inventors
Peter Greenwood
Hans Bergqvist
Ulf Skarp
Assignee (at issue)
AKZO NOBEL N.V.
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.