Granted Patent
Utility
US 4,792,582 · App. 06/895,077
Polyethylene glycol ether foam inhibitors, emulsifiers, and stabilizers for polymers
Inventors:
Rainer Hoefer, Alfred Meffert, Robert Piorr, Bernd Wegemund, Uwe Held
Patented Case
View Patent ↗
Granted: Dec 20, 1988
Filed: Aug 11, 1986
Inventors
Rainer Hoefer
Alfred Meffert
Robert Piorr
Bernd Wegemund
Uwe Held
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.