Granted Patent
Utility
US 4,524,434 · App. 06/392,146
Method for determining the azimuth and length of a deep vertical fracture in the earth
Inventor:
Daniel Silverman
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Jun 25, 1982
Inventor
Daniel Silverman
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.