Patents by Inventor Thyril L. Ladd, Jr.

Thyril L. Ladd, Jr. 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).

  • Sex pheromone produced by the female Japanese beetle: specificity of male response to enantiomers
    Patent number: 4179446
    Abstract: (Z)-5-(1-decenyl)dihydro-2(3H)-furanone, isolated from virgin female Japanese beetles, Popilla Japonica, attracted males of the species in field bioassays. However, the synthesized racemic mixture of this compound did not attract male Japanese beetles. The Z- and E-isomers and the saturated analog of both enantiomers of this compound were synthesized stereospecifically. Pure synthetic (R,Z)-5-(1-decenyl)dihydro-2(3H)-furanone was competitive with live females and with the pheromone isolated from live females in attracting males. Male response was strongly inhibited by small amounts of the (S,Z)-isomer.
    Type: Grant
    Filed: August 8, 1978
    Date of Patent: December 18, 1979
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: James H. Tumlinson, III, Michael G. Klein, Robert E. Doolittle, Thyril L. Ladd, Jr.