Granted Patent
Utility
US 4,517,322 · App. 06/534,916
Acrylated alkyd and polyester resins
Inventors:
William J. Birkmeyer, Ralph C. Gray, Rostyslaw Dowbenko, David C. Kapp, Ellor J. VanBuskirk, Rudolf Maska
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Sep 22, 1983
Inventors
William J. Birkmeyer
Ralph C. Gray
Rostyslaw Dowbenko
David C. Kapp
Ellor J. VanBuskirk
Rudolf Maska
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.