Granted Patent
Utility
US 4,320,848 · App. 06/046,157
Deep drawn and ironed pressure vessel having selectively controlled side-wall thicknesses
Inventors:
Richard Dye, Arthur W. Robichaud
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Jun 7, 1979
Inventors
Richard Dye
Arthur W. Robichaud
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.