Granted Patent
Utility
US 5,205,959 · App. 07/835,922
Alkali-stable foam inhibitors
Inventors:
Karl Schmid, Karin Koren, Detlev Stanislowski, Michael Langen
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Feb 25, 1992
Inventors
Karl Schmid
Karin Koren
Detlev Stanislowski
Michael Langen
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.