Granted Patent
Utility
US 4,732,791 · App. 06/898,670
Color plus clear application of thermosetting high solids coating composition of epoxies, polyols and anhydrides
Inventors:
William P. Blackburn, Ronald R. Ambrose, Samuel Porter, Jr., Mary J. Burkholder
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Aug 21, 1986
Inventors
William P. Blackburn
Ronald R. Ambrose
Samuel Porter, Jr.
Mary J. Burkholder
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.