Granted Patent
Utility
US 4,293,531 · App. 06/176,203
Selective removal of H.sub.2 S from gas mixtures containing CO.sub.2 and H.sub.2 S
Inventors:
Joseph H. Field, Donald H. McCrea
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Aug 7, 1980
Inventors
Joseph H. Field
Donald H. McCrea
Assignee (at issue)
Benfield 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.