Granted Patent
Utility
US 5,501,707 · App. 08/204,168
Aqueous dispersions of new amphiphilic co-oligomers for the washing- and cleaning-resistant oiling of leather and skins and their use
Inventors:
Ludwig Schieferstein, Rudolf Zauns-Huber, Joachim Conradi, Emil Ruscheinsky
Patented Case
View Patent ↗
Granted: Mar 26, 1996
Filed: May 3, 1994
Inventors
Ludwig Schieferstein
Rudolf Zauns-Huber
Joachim Conradi
Emil Ruscheinsky
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.