Granted Patent
Utility
US 6,722,159 · App. 10/075,316
Photocatalytically-activated self-cleaning article and method of making same
Inventors:
Charles B. Greenberg, Caroline S. Harris, Vincent C. Korthuis, Luke A. Kutilek, David E. Singleton, Janos Szanyi, James P. Thiel
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Feb 14, 2002
Inventors
Charles B. Greenberg
Caroline S. Harris
Vincent C. Korthuis
Luke A. Kutilek
David E. Singleton
Janos Szanyi
James P. Thiel
Assignee (at issue)
PPG Industries Ohio, 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.