Granted Patent
Utility
US 6,696,030 · App. 09/079,021
Method for reducing the chemical conversion of oxidizable or disproportionable compounds contacting carbonaceous chars
Inventor:
Richard A. Hayden
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: May 14, 1998
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.