Granted Patent
Utility
US 6,723,244 · App. 09/976,678
Method and apparatus to achieve nitrification at low solids retention times
Inventor:
Timothy Constantine
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Oct 12, 2001
Inventor
Timothy Constantine
Assignee (at issue)
CH2M HILL, 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.