Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Reexamination Certificate
2008-04-22
2011-12-27
Group, Karl (Department: 1731)
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
C501S066000
Reexamination Certificate
active
08084381
ABSTRACT:
The present invention is to provide glass exhibiting both of a low thermal expansion and a low-temperature melting property and to provide glass which is able to be manufactured under the condition where an average linear thermal expantion coefficient at 0° C. to 50° C. is preferably not more than 40×10−7° C.−1, more preferably 35×10−7° C.−1and, most preferably, 33×10−7° C.−1and a fusing temperature is preferably not higher than 1550° C., more preferably not higher than 1540° C. and, most preferably, not higher than 1530° C. The means therefor is the glass, characterized in that, where an average linear thermal expantion coefficient at 0° C. to 50° C. is not more than 40×10−7° C.−1, an Al2O3component and a B2O3component on the basis of oxides are contained and the ratio of B2O3/Al2O3in terms of % by mass is not less than 0.8.
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Bolden Elizabeth A
Group Karl
Ohara Inc.
Westerman Hattori Daniels & Adrian LLP
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