Granted Patent
Utility
US 6,750,259 · App. 10/191,386
Process for preparing gel-type cation exchangers
Inventors:
George Dimotsis, Wolfgang Podszun, Reinhold Klipper
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Jul 8, 2002
Inventors
George Dimotsis
Wolfgang Podszun
Reinhold Klipper
Assignees (at issue)
Bayer Aktiengesellschaft
Sybron Chemicals, Inc.
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.