Granted Patent
Utility
US 6,342,129 · App. 09/079,424
Process for production of carbonaceous chars having catalytic activity
Inventors:
Robert H. Vaughn, Keith R. Nicholson
Patented Case
View Patent ↗
Granted: Jan 29, 2002
Filed: May 14, 1998
Inventors
Robert H. Vaughn
Keith R. Nicholson
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.