Granted Patent
Utility
US 5,413,749 · App. 08/072,533
Process of making beads for a liquid purification bed
Inventor:
Kurt M. Geiser
Patented Case
View Patent ↗
Granted: May 9, 1995
Filed: Jun 4, 1993
Inventor
Kurt M. Geiser
Assignee (at issue)
Wheelabrator Engineered Systems 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.