Granted Patent
Utility
US 6,610,753 · App. 09/371,682
Process for preparing selective ion exchangers
Inventors:
Holger Lutjens, Klaus Rall, Axel Ingendoh, Reinhold Klipper
Patented Case
View Patent ↗
Granted: Aug 26, 2003
Filed: Aug 10, 1999
Inventors
Holger Lutjens
Klaus Rall
Axel Ingendoh
Reinhold Klipper
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.