Granted Patent
Utility
US 6,630,213 · App. 09/746,019
Recording medium excellent in ink absorptivity and process for its production, and process for producing silica-alumina composite sol
Inventors:
Katsumasa Nakahara, Hisao Inokuma, Hachirou Hirano, Toshiya Matsubara, Masako Wakabayashi, Yoshinori Kon
Patented Case
View Patent ↗
Granted: Oct 7, 2003
Filed: Dec 26, 2000
Inventors
Katsumasa Nakahara
Hisao Inokuma
Hachirou Hirano
Toshiya Matsubara
Masako Wakabayashi
Yoshinori Kon
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.