In re Greenfield

Garrett, .Judge,

delivered the opinion of the court:

Nine claims'of appellant’s application are before us on appeal from a decision of the Board of Appeals of the Patent Office sustaining the decision of the examiner rejecting them, to wit, Nos. 13, 47-50, and 53-56.

First and last during the pendency of the matter in the Patent Office a large number of claims were presented, some of which were allowed, others withdrawn, and others rejected which were not appealed here.

The application relates to “ certain new and useful improvements in regulation of combustion of fuel in furnaces,” or, to be…