Granted Patent
Utility
US 5,843,381 · App. 08/631,070
Apparatus for removal of hydrogen sulfide
Inventors:
William D. Bland, James P. Markowitz
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Apr 12, 1996
Inventors
William D. Bland
James P. Markowitz
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.