Granted Patent
Utility
US 4,764,231 · App. 07/097,530
Well stimulation process and low velocity explosive formulation
Inventors:
Frank E. Slawinski, William Frantz
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Sep 16, 1987
Inventors
Frank E. Slawinski
William Frantz
Assignee (at issue)
Atlas Powder 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.