Granted Patent
Utility
US 6,770,250 · App. 10/269,816
Apparatus and methods for removing mercury from fluid streams
Inventors:
John Arthur Cooper, Sarah Catherine Fry, Bruce Edward Johnsen
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Oct 11, 2002
Inventors
John Arthur Cooper
Sarah Catherine Fry
Bruce Edward Johnsen
Assignee (at issue)
Cooper Environmental Services LLC
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.