Granted Patent
Utility
US 4,466,550 · App. 06/426,116
Closure for a cylindrical opening having improved venting means
Inventor:
James B. Sullivan
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Sep 28, 1982
Inventor
James B. Sullivan
Assignee (at issue)
T.D. WILLIAMSON
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.