Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...
Reexamination Certificate
2006-10-10
2006-10-10
Miggins, Michael C. (Department: 1772)
Stock material or miscellaneous articles
Hollow or container type article
Glass, ceramic, or sintered, fused, fired, or calcined metal...
C428S034100, C428S034400, C428S426000, C428S432000, C428S433000, C428S446000, C428S450000, C428S457000, C117S206000, C117S208000, C117S220000, C117S930000, C117S932000, C422S245100, C422S908000, C432S262000, C432S264000
Reexamination Certificate
active
07118789
ABSTRACT:
A silica glass crucible is manufactured by introducing into a rotating crucible mold bulk silica grain to form a bulky wall including a bottom wall and a side wall. After heating the interior of the mold to begin to fuse the bulk silica grains, an inner silica grain, doped with aluminum, is introduced. The heat at least partially melts the inner silica grain, allowing it to fuse to the wall to form an inner layer. The crucible is cooled, the fused silica grains forming nuclei of crystalline silica within the inner layer.
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Kemmochi Katsuhiko
Mosier Robert O.
Spencer Paul G.
Heraeus Shin-Etsu America
Marger Johnson & McCollom PC
Miggins Michael C.
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