Application of John J. Van Venrooy and Walter L. Borkowski

RICH, Judge.

This appeal is from the decision of the Patent Office Board of Appeals affirming the rejection of all claims, 1-10, of application serial No. 144,219, filed October 10, 1961, entitled “Preparation of Unsaturated Chlorohydrocarbons.”

The Invention

Appellants’ invention is a method of preparing unsaturated chlorohydrocar-bons containing two carbon atoms, e. g., vinyl chloride, trichloroethylene, and tetrachloroethylene. This method, which involves reacting ethane and/or ethylene with ferric chloride in the vwpor phase at a temperature in the range of 315-500°C., is based on the…