Granted Patent
Utility
US 6,422,059 · App. 09/630,112
Apparatus for detecting changes in concentrations of components of fluid mixtures
Inventors:
Micahel Greenbank, David T. Doughty, Mark A. Bollinger
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Aug 1, 2000
Inventors
Micahel Greenbank
David T. Doughty
Mark A. Bollinger
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.