Patents by Inventor Donald M. Knutson

Donald M. Knutson 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).

  • Pruning sealant composition and methods of making and using
    Patent number: 5993891
    Abstract: A pruning sealant composition comprising lanolin and a drying agent effective for forming a film upon an exposed surface of the pruning sealant composition. An optional high temperature viscosity modifier may be included in the sealer composition. Also disclosed is a method of making the pruning sealant composition and a method of sealing a pruning site with the pruning sealant composition.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: November 30, 1999
    Assignee: Intagra, Inc.
    Inventors: Sheldon G. Danielson, Donald M. Knutson