Patents by Inventor Charles Richard Walk

Charles Richard Walk 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 preparing lithium hexafluoroarsenate of high purity
    Patent number: 4065550
    Abstract: Lithium hexafluoroarsenate of high purity is prepared by a metathetical rtion between potassium hexafluoroarsenate and lithium perchlorate in an inert organic solvent such as methyl formate. The potassium perchlorate produced is insoluble in the solvent and can be readily separated from the lithium hexafluoroarsenate which is soluble in the solvent.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: December 27, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Walter B. Ebner, Charles Richard Walk
  • Process for purifying lithium hexafluoroarsenate
    Patent number: 4053571
    Abstract: Lithium hexafluoroarsenate containing impurities, such as LiAsF.sub.5 OH HF, is purified by passing a solution of the impure product in an organic solvent, such as methyl formate, through a column of activated alumina which selectively adsorbs and removes such impurities.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: October 11, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Walter B. Ebner, Charles Richard Walk