Granted Patent
Utility
US 6,342,293 · App. 09/489,941
Alumina sol, alumina hydrate powder and processes for their production
Inventors:
Katsumasa Nakahara, Kenji Yamada, Hachiro Hirano, Toshiya Matsubara
Patented Case
View Patent ↗
Granted: Jan 29, 2002
Filed: Jan 24, 2000
Inventors
Katsumasa Nakahara
Kenji Yamada
Hachiro Hirano
Toshiya Matsubara
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.