US 6,440,517 B1Granted

Glass material

AssigneeHitachi, Ltd.

InventorsHiroki Yamamoto, Takashi Naito, Takashi Namekawa, Yasutaka Suzuki, Ken Takahashi, Motoyasu Terao, Toshimichi Shintani

Life of this patent

Estimating the term…

Abstract

A glass including SiO2, Na2O, MgO, Al2O3 and cobalt oxide, wherein the cobalt oxide is 4.5-85 wt % as an oxide of CoO or 4.9-91 wt % as an oxide of Co3O4.

Claims8

Dependent claims

A glass comprising SiO2 and cobalt oxide, wherein said cobalt oxide is 4.5-85 wt % as an oxide of CoO or 4.9-91 wt % as an oxide of CO3O4.

Dependencies are inferred from the claim text.

Facts

Application: 09/722,503Filed 28 Nov 2000 · continuation
Priority: JP 9-1506469 Jun 1997
Granted: 27 Aug 2002
Term ends: Not estimatedThe source records don’t support an estimate.

Classification30 codes

G11B 7/252
Characterised by the selection of the material: of layers other than recording layers
C03C 3/062
Containing silica: with less than 40% silica by weight
C03C 3/078
With 40% to 90% silica, by weight: containing an oxide of a divalent metal, e.g. an oxide of zinc
C03C 3/087
Containing an oxide of a divalent metal: containing calcium oxide, e.g. common sheet or container glass

Family

Application09/090,382Parent of this continuation · filed 4 Jun 1998
Application09/432,782Parent of this continuation · filed 3 Nov 1999
US 5,985,401 AParent of this continuation · filed 16 Nov 1999
US 6,177,169 B1Parent of this continuation · filed 23 Jan 2001
US 6,440,517 B1This patent

From the US filing history. Foreign family members aren’t listed.

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