Stock material or miscellaneous articles – Surface property or characteristic of web – sheet or block – Surface modified glass
Reexamination Certificate
2010-05-28
2011-11-22
Blackwell, Gwendolyn (Department: 1784)
Stock material or miscellaneous articles
Surface property or characteristic of web, sheet or block
Surface modified glass
C428S409000, C428S426000, C428S428000, C428S432000, C501S055000, C501S063000, C501S065000, C501S066000, C501S067000, C501S068000, C501S069000, C501S070000, C501S072000
Reexamination Certificate
active
08062749
ABSTRACT:
An aircraft transparency in a glass piece, wherein the glass piece includes a chemically tempered first major surface and a chemically tempered opposite second major surface, a first case depth begins at the first major surface, a second case depth begins at the second major surface, and a tensile stress zone is within the glass piece between the end points of the first and the second case depths. The glass between the end points of the first and second case depth has a glass composition including:IngredientPercent by weightSiO260 to 75;Al2O318 to 28; andLi2O3 to 9, andthe glass has at least one of the following properties (a) a log 10 viscosity temperature of at least 1413° F. and (b) a liquidus temperature of at least 2436° F.
REFERENCES:
patent: 3357876 (1967-12-01), Rinehart
Baldauff James M.
Goodwin George B.
Mishra Amarendra
Shelestak Larry J.
Blackwell Gwendolyn
PPG Industries Ohio, Inc
Siminerio Andrew C.
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