Granted Patent
Utility
US 4,252,249 · App. 06/118,924
Lid for pump assembly
Inventors:
William H. Beckhardt, Richard O. Carlson, William N. Rowley, Gordon F. Ehret, Dani Setjo
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Feb 6, 1980
Inventors
William H. Beckhardt
Richard O. Carlson
William N. Rowley
Gordon F. Ehret
Dani Setjo
Assignee (at issue)
The Marley-Wylain 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.