Granted Patent
Utility
US 5,207,776 · App. 07/771,906
Bi-metallic extrusion billet preforms and method and apparatus for producing same
Inventor:
Robert Pearce
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Oct 4, 1991
Inventor
Robert Pearce
Assignee (at issue)
The Babcock & Wilcox 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.