Granted Patent
Utility
US 4,384,726 · App. 06/317,705
Expandable lubricating packing assembly for wellheads
Inventor:
Danny S. Meyer
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Nov 2, 1981
Inventor
Danny S. Meyer
Assignee (at issue)
ACF Industries Incorporated
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.