Granted Patent
Utility
US 5,750,490 · App. 08/687,587
Detergent mixtures
Inventors:
Anneliese Wilsch-Irrgang, Fred Schambil, Theodor Voelkel, Miguel Osset, Rafael Pi
Patented Case
View Patent ↗
Granted: May 12, 1998
Filed: Jul 31, 1996
Inventors
Anneliese Wilsch-Irrgang
Fred Schambil
Theodor Voelkel
Miguel Osset
Rafael Pi
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.