Granted Patent
Utility
US 4,889,545 · App. 07/275,102
Hydrocarbon gas processing
Inventors:
Roy E. Campbell, John D. Wilkinson, Hank M. Hudson
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Nov 21, 1988
Inventors
Roy E. Campbell
John D. Wilkinson
Hank M. Hudson
Assignee (at issue)
Elcor 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.