Patents by Inventor Joseph Jack Kirkland

Joseph Jack Kirkland 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).

  • Macroporous microspheroids and a process for their manufacture
    Patent number: 4070286
    Abstract: Disclosed herein is a powder of discrete, macroporous, microspheroids, each having an average diameter in the range of 2 to 50 microns and each composed of a plurality of large colloidal particles joined and cemented together at their points of contact by 1 to 10% by weight of nonporous, amorphous silica. These microspheroids have a high degree of mechanical stability and a surface area between about 80 and 110% of that of the large colloidal particles. Also disclosed is a process for the manufacture of this powder.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: January 24, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ralph Kingsley Iler, Joseph Jack Kirkland
  • Controlled surface porosity particles and a method for their production
    Patent number: 4070283
    Abstract: Superficially porous macroparticles of improved characteristics are formed from an impervious core having a diameter in the range of about 5 to about 500 microns, at least two monolayers of like microparticles adhered to the core, each microparticle having an average diameter in the range of about 0.005 to about 1.0 micron, and at least two monolayers of like ultramicroparticles adhered to the surface of the microparticles, each ultramicroparticle having a diameter in the range of about 1.0 to about 15 millimicrons.
    Type: Grant
    Filed: December 8, 1976
    Date of Patent: January 24, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Joseph Jack Kirkland
  • Chromatographic liquid dispensing inlet and method
    Patent number: T959004
    Abstract: The chromatographic separation efficiency of a sample liquid injected into a resolving zone and eluted through the resolving zone with a liquid carrier or mobile phase is improved if the sample is injected at a point located centrally on the inlet end of the resolving zone and the eluting carrier liquid is applied uniformly across substantially the entire inlet end of the resolving zone surrounding the sample injection point.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: June 7, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph Jack Kirkland, Charles Heritage Dilks, Jr.