In re Siu

This is an appeal from a decision of the Board of Appeals of the Patent Office affirming the rejection by the Primary Examiner of claims 1, 2, 4, 6, 7, 8, and 9 of appellant’s application for a patent on / “Curled Glass Filaments and Methods of Making the Same.” Claim 5 was allowed. Only method claims are here on appeal.

Claim 1 is illustrative of the subject matter defined by the rejected claims and reads as follows:

1. A method of preparing filaments of glass characterized by causing molten glass to flow in a liquid stream to the vertex of a substantially cone-shaped, heated, rotating stream…