Granted Patent
Utility
US 5,403,886 · App. 07/889,684
Aqueous dispersions of polysiloxanes
Inventors:
Harald Chrobaczek, Gunther Tsuchida
Patented Case
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Granted: Apr 4, 1995
Filed: May 27, 1992
Inventors
Harald Chrobaczek
Gunther Tsuchida
Assignee (at issue)
Ciba-Geigy
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.