Patents by Inventor Antonio de la Cuadra Herrera

Antonio de la Cuadra Herrera 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).

  • Process for the recovery of germanium from solutions that contain it
    Patent number: 4886648
    Abstract: Process for the recovery of germanium from solutions that contain it, in particular from solutions diluted by the addition of tartaric acid and extraction with an organic solution of a tertiary amine. In the reextraction with sodium hydroxide there is obtained a concentrate of germanium.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: December 12, 1989
    Assignee: Asturiana De Zinc, S.A.
    Inventors: Francisco J. S. Menendez, Fernando M. S. Menendez, Antonio De La Cuadra Herrera, Francisco A. Tamargo, Luis P. Lorenzo, Matias R. Valcarcel, Vicente A. Fernandez
  • Process for purifying metallurgical gases containing sulphurous anhydride by extracting mercury
    Patent number: 3974254
    Abstract: The present invention relates to a process for purifying metallurgical gases containing sulphuric anhydride by extracting mercury, using the sulphurous anhydride which accompanies the metallurgical gases as an oxidizing agent for the mercury, an additional contribution of sulphurous anhydride being made when the latter is deficient, and employing in addition an acid to facilitate the oxidization of the mercury and a soluble thiocyanate in order to complete the oxidation of the mercury.
    Type: Grant
    Filed: December 10, 1973
    Date of Patent: August 10, 1976
    Assignee: Patronato de Investigacion Cientifica y Tecnica "Juan de la Cierva" del Consejo Superior de Investigaciones Cientificas
    Inventors: Antonio de la Cuadra Herrera, Miguel Fernandez Tallante, Armando Rodriguez Sanchez