Granted Patent
Utility
US 4,284,138 · App. 06/153,808
Coated screen jacket and coated pipe base assembly and method of making same
Inventor:
Richard E. Allred
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: May 27, 1980
Inventor
Richard E. Allred
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.