prov:value
| - detecting oxygen in a gas streamUS3842270 *Oct 29, 1973Oct 15, 1974Continental Oil CoPressurized oil-in-water monitorUS4323777 *May 19, 1980Apr 6, 1982Infrared Industries, Inc.Hydrocarbon gas analyzerUS4351642 *Apr 28, 1980Sep 28, 1982Institut Francais Du PetroleElements sensitive to certain polluting agents, particularly hydrocarbons and method of useUS4501324 *Dec 27, 1982Feb 26, 1985Union Oil
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