L. HAND, Circuit Judge.
This is the usual suit in equity upon patent 1,854,600, for a product and process; the only claims in suit are for the process and only four of those, 1, 2, 3 and 5. The product is a chemical combination of carbolic acid (phenol), and formaldehyde, whose supposed novelty lies in its physical, as distinguished from its chemical, characteristics. It is in the form of a "gel," a word denoting the hardening of a colloidal solution, or "sol." In...
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