Granted Patent
Utility
US 4,570,714 · App. 06/564,756
Gravel pack assembly
Inventors:
Dewayne Turner, Raymond A. Menard, Dean S. Oneal
Patented Case
View Patent ↗
Granted: Feb 18, 1986
Filed: Dec 22, 1983
Inventors
Dewayne Turner
Raymond A. Menard
Dean S. Oneal
Assignee (at issue)
Geo Vann, 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.