Granted Patent
Utility
US 5,835,865 · App. 08/779,368
Method and device for the disposal of a cation exchanger
Inventors:
Horst-Otto Bertholdt, Rainer Gassen
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: Jan 6, 1997
Inventors
Horst-Otto Bertholdt
Rainer Gassen
Assignee (at issue)
Siemens Aktiengesellschaft
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.