Granted Patent
Utility
US 4,416,331 · App. 06/347,829
Bimetallic well screen for use in injection wells and method of making same
Inventor:
James A. Lilly, Jr.
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Feb 11, 1982
Inventor
James A. Lilly, 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.