Granted Patent
Utility
US 4,487,259 · App. 06/476,180
Prepacked well screen and casing assembly
Inventor:
Charles W. McMichael, Jr.
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Mar 17, 1983
Inventor
Charles W. McMichael, Jr.
Assignee (at issue)
UOP LLC
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.