Granted Patent
Utility
US 5,504,050 · App. 08/407,233
Process for making a catalytically-active carbonaceous char
Inventor:
Richard A. Hayden
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Mar 21, 1995
Inventor
Richard A. Hayden
Assignee (at issue)
CALGON CARBON CORPORATION
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.