Patents by Inventor S. Mark Lee

S. Mark Lee 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).

  • Azadirachtin derivative insecticides
    Patent number: 5047242
    Abstract: Derivatives of azadirachtin are described which should facilitate their synthesis and provide greater stability than their naturally-occurring counterpart. The derivative 2',3',22,23-tetrahydorazadirachtin is also described, that derivative retaining full activity and having enhanced stability. Also described is a newly identified, naturally occurring derivative of azadirachtin, 1-cinnamoylmelianolone, and several of its derivatives. Insecticidal and antifeedant compositions including these compounds, and processes for their use, are also described.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: September 10, 1991
    Assignee: Native Plant Institute ("NPI")
    Inventors: James A. Klocke, S. Mark Lee, Ronald B. Yamasaki