Granted Patent
Utility
US 5,404,954 · App. 08/061,867
Well screen for increased production
Inventors:
Lee E. Whitebay, Nobuo Morita
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: May 14, 1993
Inventors
Lee E. Whitebay
Nobuo Morita
Assignee (at issue)
Conoco 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.