L. HAND, Circuit Judge.
This is an appeal from a decree, dismissing a bill in equity for the infringement of claims one and three of patent No. 1,694,341, issued to Frank Crossley. The invention was for a process of producing from milk of magnesia a dry tablet, which, when immersed in water, should revert to that substance. Milk of magnesia is the colloquial name for magnesium hydroxide suspended in water; the drug, being in colloidal form, does not dissolve, but...
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