Patents by Inventor Herbert J. McQueston

Herbert J. McQueston 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).

  • Uniform oxide microspheres and a process for their manufacture
    Patent number: 4010242
    Abstract: Oxide microspheres having a diameter in the 0.5 to 20 micron range are produced by forming a mixture of urea or melamine and formaldehyde in an aqueous sol containing colloidal oxide particles. Copolymerization of the organic constituents produces coacervation of the organic material into microparticles containing the inorganic material. The organic constituent can be burned out to form a powder of uniform-sized porous microparticles consisting of an interconnected array of inorganic colloidal particles separated by uniform-sized pores.
    Type: Grant
    Filed: November 20, 1973
    Date of Patent: March 1, 1977
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Ralph K. Iler, Herbert J. McQueston