Granted Patent
Utility
US 4,915,723 · App. 07/374,250
Apparatus for casting silicon with gradual cooling
Inventors:
Kyojiro Kaneko, Jun Masuda
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Jun 30, 1989
Inventors
Kyojiro Kaneko
Jun Masuda
Assignee (at issue)
OSAKA TITANIUM
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.