Granted Patent
Utility
US 4,871,483 · App. 07/039,306
Novel non-depositing defoaming compositions
Inventors:
Thomas C. Friel, Anthony J. O'Lenick, Jr.
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Apr 16, 1987
Inventors
Thomas C. Friel
Anthony J. O'Lenick, Jr.
Assignee (at issue)
GAF Corporation
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.