Patents by Inventor Jan Lofquist

Jan Lofquist 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).

  • Method for inhibiting spruce bark beetles
    Patent number: 5223542
    Abstract: The present invention relates to a method for inhibiting the six toothed spruce bark beetle Pityogenes chalcographus, by preventing aggregation and/or infestation of spruce, whereby one applies an inhibitory active amount of verbenone on spruce.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: June 29, 1993
    Inventors: John Byers, Jan Lofquist