Radiator Specialty Co. v. Buhot

WOOLLEY, Circuit Judge.

The plaintiff sued for infringement of Letters Patent No. 1,613,055, issued to him on January 4, 1927. Only the first claim was in suit. The single issue was validity of the patent, the defendant admitting that, if valid, he infringed. The learned trial court found the patent invalid for want of invention in view of the art and dismissed the bill. The case is here on the plaintiff’s appeal.

The invention, as disclosed by the claim, is for a composition of matter “for stopping leaks in hot-water circulating systems, comprising a mixture of aluminum, flaxseed meal, sulphur…