Granted Patent
Utility
US 4,465,492 · App. 06/408,580
Process for the preparation of concentrated aqueous formulations of synthetic anionic dispersants and the use thereof
Inventor:
Roland Putzar
Patented Case
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Granted: Aug 14, 1984
Filed: Aug 17, 1982
Inventor
Roland Putzar
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.