Granted Patent
Utility
US 6,405,800 · App. 09/489,179
Method and apparatus for controlling fluid flow in a well
Inventors:
David Walker, Dewayne Turner, Marvin Bryce Traweek
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Jan 21, 2000
Inventors
David Walker
Dewayne Turner
Marvin Bryce Traweek
Assignee (at issue)
OSCA, 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.