Granted Patent
Utility
US 6,280,821 · App. 09/391,953
Reusable mask and method for coating substrate
Inventors:
Randy R. Kadunce, Peter T. Dishart, Robert T. Shumaker, Jr.
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Sep 8, 1999
Inventors
Randy R. Kadunce
Peter T. Dishart
Robert T. Shumaker, Jr.
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.