Granted Patent
Utility
US 5,556,573 · App. 08/374,687
Process for the production of storable nonionic surfactants
Inventors:
Manfred Weuthen, Thomas Engels, Herman Hensen, Holger Tesmann, Dieter Nickel
Patented Case
View Patent ↗
Granted: Sep 17, 1996
Filed: Jan 26, 1995
Inventors
Manfred Weuthen
Thomas Engels
Herman Hensen
Holger Tesmann
Dieter Nickel
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.