Granted Patent
Utility
US 5,772,709 · App. 08/634,241
Apparatus for removing ammonia and carbon dioxide gases from a steam
Inventors:
Donald Neal Ruck, James Richard Lines, Roderick E. Athey, David William Tice
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Apr 18, 1996
Inventors
Donald Neal Ruck
James Richard Lines
Roderick E. Athey
David William Tice
Assignee (at issue)
Graham Holdings Company
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.