Patents by Inventor Hazen L. Hoyt, 4th

Hazen L. Hoyt, 4th 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).

  • Kaolin clay slurries of reduced viscosity
    Patent number: 4309222
    Abstract: Aqueous refined kaolin clay slurries of reduced low shear viscosity are prepared by dispersing the clay under controlled pH conditions in water containing a combination of water-soluble citrate and water-soluble polyacrylate within a specified range of concentrations.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: January 5, 1982
    Assignee: Pfizer Inc.
    Inventor: Hazen L. Hoyt, 4th
  • Manganese micronutrient solutions
    Patent number: 4265653
    Abstract: An aqueous manganese micronutrient solution comprising between 0.1 and 2.0 wt. % of ferrous ion, about 5 wt. % manganous ion, between 1 and 1.5 moles of citric acid anion per mole of manganous ion and ammonia in an amount to maintain the pH of the solution between 7.5 and 12.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: May 5, 1981
    Assignee: Pfizer Inc.
    Inventors: Hazen L. Hoyt, 4th, Daniel R. Uhr, Jr.