Granted Patent
Utility
US 5,379,841 · App. 08/045,930
Method for reducing or completely stopping the influx of water in boreholes for the extraction of oil and/or hydrocarbon gas
Inventors:
Gunter Pusch, Mohammad Ranjbar
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Apr 12, 1993
Inventors
Gunter Pusch
Mohammad Ranjbar
Assignee (at issue)
Hoechst GmbH
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.