Granted Patent
Utility
US 6,678,050 · App. 10/266,638
In-situ detection and analysis of methane in coal bed methane formations with spectrometers
Inventors:
John Pope, John Herries
Patented Case
View Patent ↗
Granted: Jan 13, 2004
Filed: Oct 9, 2002
Inventors
John Pope
John Herries
Assignee (at issue)
WellDog, Inc.
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.