Granted Patent
Utility
US 5,057,572 · App. 07/424,244
Aqueous, finely divided to optically clear, thermally and mechanically stable silicone emulsions, a process for their preparation and their use
Inventors:
Harald Chrobaczek, Gunther Tschida
Patented Case
View Patent ↗
Granted: Oct 15, 1991
Filed: Oct 16, 1989
Inventors
Harald Chrobaczek
Gunther Tschida
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.