In re Delancey

The application for patent, all claims of which are before us by appeal from the decision of the Board of Appeals of the United States *761Patent Office affirming the decision of the Primary Examiner rejecting them, is broadly entitled “For Heating Plants.” The specification states that the claimed invention “contemplates an oil fired furnace or heating plant of the type employing a boiler and used either for steam or hot water heating, or for supplying domestic hot water.”

It is said in the specification, but not defined in the claims, that

⅜ # ⅜ the heating plant uses a boiler of much smaller…