Granted Patent
Utility
US 4,640,815 · App. 06/788,416
Method and assembly for producing extrusion-clad tubular product
Inventors:
Karl S. Brosius, Scott B. Justus, David A. Salvatora
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Oct 17, 1985
Inventors
Karl S. Brosius
Scott B. Justus
David A. Salvatora
Assignee (at issue)
Crucible Materials Corporation
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.