Granted Patent
Utility
US 5,667,669 · App. 08/620,647
Methods for inhibiting foam
Inventor:
Paul R. Hart
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Mar 22, 1996
Inventor
Paul R. Hart
Assignee (at issue)
Betzdearborn, 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.