Patents by Inventor David L. Tomaja

David L. Tomaja 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).

  • Crown ether uranyl halide complexes
    Patent number: 4186175
    Abstract: Uranium oxide is recovered from an aqueous solution of uranyl halides by extracting uranyl halide from the aqueous solution with an organic liquid, forming a crown ether uranyl halide complex in the organic liquid, and then contacting the uranyl halide crown ether complex with water, carboxylate ion, and light under suitable conditions. Also disclosed are certain novel crown ether uranyl halide complexes and their preparation. Also disclosed is the use of 18-crown-6 to selectively recover uranyl halide from a solution thereof containing other metal salts.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: January 29, 1980
    Assignee: Phillips Petroleum Company
    Inventor: David L. Tomaja
  • Uranium oxide production
    Patent number: 4158616
    Abstract: Uranium oxide hydrate is produced by irradiating with light a solution of a suitable diluent, water-soluble uranium salt, carboxylate ion, and a rate-promoting amount of at least one suitable crown ether.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: June 19, 1979
    Assignee: Phillips Petroleum Company
    Inventor: David L. Tomaja