Patents by Inventor Phillippe Leclercq

Phillippe Leclercq has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Processes for conversion of sulfurous anhydride to sulfuric anhydride and vice versa with a Fe, Cu, alkali metal containing catalyst
    Patent number: 4158048
    Abstract: Novel processes for converting sulfurous anhydride to sulfuric anhydride and vice versa, which processes are carried out in the gaseous phase with a catalyst comprising iron, copper, and at least one alkali metal selected from among sodium and potassium, the catalyst simultaneously having good activity at 600.degree. C. and withstanding temperatures up to 850.degree. C. without degradation.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: June 12, 1979
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventor: Phillippe Leclercq
  • Novel catalyst for conversion of sulfurous anhydride to sulfuric anhydride and vice versa
    Patent number: 4127509
    Abstract: A novel catalyst for converting sulfurous anhydride to sulfuric anhydride and vice versa, which catalyst comprises iron, copper, and at least one alkali metal selected from among sodium and potassium, the catalyst simultaneously having good activity at 600.degree. C and withstanding temperatures up to 850.degree. C without degradation.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: November 28, 1978
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventor: Phillippe Leclercq