Granted Patent
Utility
US 5,152,925 · App. 07/573,680
Polymeric defoamer compositions
Inventor:
Robert Furman
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Aug 27, 1990
Inventor
Robert Furman
Assignee (at issue)
Exxon Chemical Patents, 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.