Granted Patent
Utility
US 4,891,113 · App. 06/864,394
Method of making architectural coating with interference colors
Inventor:
Russell C. Criss
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: May 19, 1986
Inventor
Russell C. Criss
Assignee (at issue)
PPG Industries, 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.