Granted Patent
Utility
US 5,599,481 · App. 08/493,178
Defoamer
Inventor:
Kristina M. Walger
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Jun 21, 1995
Inventor
Kristina M. Walger
Assignee (at issue)
Henkel Limited
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.