Granted Patent
Utility
US 5,964,117 · App. 08/817,695
Backward extrusion method and product
Inventors:
Nigel John Henry Holroyd, John T. Evans, Robert Arthur Cudney
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: May 30, 1997
Inventors
Nigel John Henry Holroyd
John T. Evans
Robert Arthur Cudney
Assignee (at issue)
LUXFER GROUP LIMITED
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.