Granted Patent
Utility
US 4,135,545 · App. 05/822,104
Ball valve seat assembly having a swaged seat ring to retain the face seal
Inventors:
James M. Fowler, Jr., George A. Moran
Patented Case
View Patent ↗
Granted: Jan 23, 1979
Filed: Aug 5, 1977
Inventors
James M. Fowler, Jr.
George A. Moran
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.