Granted Patent
Utility
US 4,508,315 · App. 06/519,617
Bidirectional valve seal
Inventors:
Carl F. Livorsi, Joseph A. Wucik, Jr., Philip J. Dorrian, Lawrence F. Struzik
Patented Case
View Patent ↗
Granted: Apr 2, 1985
Filed: Aug 2, 1983
Inventors
Carl F. Livorsi
Joseph A. Wucik, Jr.
Philip J. Dorrian
Lawrence F. Struzik
Assignee (at issue)
Edison International Inc.
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.