Granted Patent
Utility
US 6,342,162 · App. 09/582,786
Removal of heavy metal ions from aqueous media
Inventor:
Holger Heidenreich
Patented Case
View Patent ↗
Granted: Jan 29, 2002
Filed: Jul 3, 2000
Inventor
Holger Heidenreich
Assignee (at issue)
Bayer 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.