Granted Patent
Utility
US 6,202,445 · App. 09/249,066
Vacuum degassing apparatus for molten glass and method to rise vacuum degassing apparatus temperature
Inventors:
Mitsuo Sugimoto, Shigekuni Inoue, Takashi Iketani, Hiroshi Kurata, Yasuharu Hirabara
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Feb 12, 1999
Inventors
Mitsuo Sugimoto
Shigekuni Inoue
Takashi Iketani
Hiroshi Kurata
Yasuharu Hirabara
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.