Granted Patent
Utility
US 4,923,508 · App. 07/348,595
Segmented induction skull melting crucible and method
Inventors:
Randall S. Diehm, Blake K. Zuidema
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: May 8, 1989
Inventors
Randall S. Diehm
Blake K. Zuidema
Assignee (at issue)
HOWMET 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.