Granted Patent
Utility
US 4,482,086 · App. 06/520,267
Expandable packer assembly for sealing a well screen to a casing
Inventors:
Walter R. Wagner, Leslie K. Bearl
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Aug 4, 1983
Inventors
Walter R. Wagner
Leslie K. Bearl
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.