Process for the production of glass shaped material, crystallized glass material, process for the production of crystallized glass material, process for the production of magnetic disk substrate blank, process for the production of magnetic disk substrate and process for the production of magnetic disk
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United States of America Patent
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Issued Date -
Mar 29, 2007
app pub date -
Sep 21, 2006
filing date -
Sep 27, 2005
priority date (Note) -
Abandoned
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Abstract
A process for stably producing a glass shaped material as a base material for a crystallized glass material, which includes casting a molten glass into a through hole of a mold, the through hole having a straight central axis, said central axis being vertical or slanted relative to a horizontal, and shaping the molten glass into a rod-like glass shaped material as a base material for a crystallized glass material.
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