Granted Patent
Utility
US 5,402,677 · App. 08/200,263
Method of determining drillstring bottom hole assembly vibrations
Inventors:
Paul R. Paslay, Yih-Min Jan
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: Feb 23, 1994
Inventors
Paul R. Paslay
Yih-Min Jan
Assignee (at issue)
Atlantic Richfield 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.