Granted Patent
Utility
US 5,736,096 · App. 08/691,320
Apparatus for purifying metal
Inventors:
Ryotatsu Otsuka, Jin Zhang, Takashi Tomita, Tohru Nunoi, Tomohiro Machida
Patented Case
View Patent ↗
Granted: Apr 7, 1998
Filed: Aug 2, 1996
Inventors
Ryotatsu Otsuka
Jin Zhang
Takashi Tomita
Tohru Nunoi
Tomohiro Machida
Assignees (at issue)
SHARP KABUSHIKI KAISHA
Showa Aluminum Corp.
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.