Granted Patent
Utility
US 4,586,720 · App. 06/693,796
Neck seal
Inventors:
Thomas E. Simmons, Ralph Divirgilio, Charles L. Innis, Jr.
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Jan 23, 1985
Inventors
Thomas E. Simmons
Ralph Divirgilio
Charles L. Innis, Jr.
Assignee (at issue)
Morgan Construction Company
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.