Granted Patent
Utility
US 5,697,422 · App. 08/238,465
Apparatus and method for cold chamber die-casting of metal parts with reduced porosity
Inventors:
Jamal Righi, James R. Fields, Eric D. Arndt
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: May 5, 1994
Inventors
Jamal Righi
James R. Fields
Eric D. Arndt
Assignee (at issue)
Aluminum Company of America
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.