Granted Patent
Utility
US 4,051,921 · App. 05/755,104
Grease plug
Inventor:
Jerome F. Sheldon
Patented Case
View Patent ↗
Granted: Oct 4, 1977
Filed: Dec 28, 1976
Inventor
Jerome F. Sheldon
Assignee (at issue)
REXNORD GMBH
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.