Patents by Inventor Daniel G. Hann

Daniel G. Hann 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).

  • Polyurethane foam composites for grower applications and related methods
    Patent number: 6479433
    Abstract: A horticultural growing medium comprises a polyisocyanate-polyol-based polymer, and at least one filler material. A method of making a horticultural growing medium comprises the steps of mixing at least one filler material with a polyisocyanate-polyol-based quasi-prepolymer composition, to form a quasi-prepolymer/filler mixture and applying water to the quasi-prepolymer/filler mixture to form a hydrophilic growing medium. A method of growing plant seedlings comprising planting a seed or seedling in a horticultural growing medium containing a hydrophilic polyisocyanate-polyol-based polymer and at least one filler material, is also disclosed. A hydrophilic urethane polymer comprises the reaction product of a quasi-prepolymer and water wherein the quasi-prepolymer contains an isocyanate and a hydrophilic polyol.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: November 12, 2002
    Assignee: Smithers-Oasis Company
    Inventors: Daniel G. Hann, Vahid Sendijarevic, Kurt C. Frisch