Mantle Lamp Co. v. Aluminum Products Co.

This is a suit for infringement of Claims 1, 3 to 14, inclusive, 17, 18, and 21 to 24, inclusive, of the Blair Patent No. 1,435,199 for a heat-insulated receptacle. The District Court held all of the claims invalid by reason of lack of invention, prior invention, anticipation, as being for an aggregation and as involving only mechanical skill. That court further limited the claims to the particular structure disclosed in the application, and, so limited, held them not infringed. It also found that unreasonable delay in filing disclaimers voided all the claims. The Circuit Court of Appeals…