LUHRING, Justice.
This is an action under R.S. § 4915, 35 U.S.C.A. § 63, in which the plaintiff seeks to have the Court authorize the allowance of certain claims to a refractory product and method of making it.
The specification of the Yoshiki application on which the claims in issue are based reads as follows:
"The usual batch for electro-melting for casting refractories is a mixture of aluminous and siliceous substances containing 1% or...
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