Granted Patent
Utility
US 4,753,485 · App. 06/887,124
Solution mining
Inventor:
Milton E. Goodhart
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Jul 18, 1986
Inventor
Milton E. Goodhart
Assignee (at issue)
Hydril Company
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.