Granted Patent
Utility
US 5,466,645 · App. 08/219,207
Method for reactivating nitrogen-treated carbon catalysts
Inventor:
Richard A. Hayden
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Mar 29, 1994
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.