Patents by Inventor Lionel Samuel Sandell

Lionel Samuel Sandell 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).

  • Water-dispersible granular agricultural compositions made by heat extrusion
    Patent number: 5714157
    Abstract: Rapidly disintegrating water-dispersible granular agricultural compositions comprising by weight based on the total weight of the composition (a) 0.01-80% of one or more active ingredients, (b) 0.004-60% of a base, (c) 5-95% of urea, (d) 1-30% of one or more urea modifiers and (e) optionally one or more additives selected from wetting agents, dispersants, lubricants, anti-caking agents, chemical stabilizers, and inert diluents that are formed by extrusion.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: February 3, 1998
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lionel Samuel Sandell, Robert David Wysong
  • Pigmented microporous silica microspheres produced by a water in oil emulsion
    Patent number: 4090887
    Abstract: Pigmented silica microspheres having an average diameter from 2 .mu.m to 100 .mu.m and consisting essentially of from 10% to 70% by weight of particulate pigment, dispersed throughout a microporous silica matrix and, optionally, containing a coating of dense amorphous silica. The microspheres are produced by acidifying a water-in-oil emulsion. The pigmented silica micropheres are particularly useful as opacifying agents for coating compositions and as fillers for paper.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: May 23, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Mark James Marquisee, Lionel Samuel Sandell
  • Vesiculated silica microspheres
    Patent number: 4011096
    Abstract: Vesiculated silica microspheres having an average diameter from 0.5.mu. to 50.mu., a maximum vesicle diameter less than 50.mu. and a volume of vesicles from 5 to 95% of the total volume of the microspheres, produced by acidifying an oil-in-water-in-oil emulsion prepared by a double emulsion technique. The vesiculated silica microspheres are particularly useful as opacifying agents for coating compositions and as fillers for paper.
    Type: Grant
    Filed: June 10, 1975
    Date of Patent: March 8, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lionel Samuel Sandell