Granted Patent
Utility
US 4,916,616 · App. 06/939,400
Self-consistent log interpretation method
Inventors:
Robert Freedman, John E. Puffer
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Dec 8, 1986
Inventors
Robert Freedman
John E. Puffer
Assignee (at issue)
BP Exploration Inc.
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.