Granted Patent
Utility
US 4,685,516 · App. 06/820,851
Apparatus for operating wireline tools in wellbores
Inventors:
Lonnie J. Smith, Curtis G. Blount, Steven G. Petermann
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Jan 21, 1986
Inventors
Lonnie J. Smith
Curtis G. Blount
Steven G. Petermann
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.