Patents by Inventor Jacqueline Dawn Percy

Jacqueline Dawn Percy 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).

  • Thermochromic media
    Patent number: 5705093
    Abstract: An improved ink comprising a thermochromic liquid crystalline media comprising at least one optically inactive nematic component and at least one optically active component, the improvement wherein the optically active component comprises at least one menthol derivative of formula I ##STR1## wherein ##STR2## is 1,4-phenylene optionally substituted by up to 4 methyl group and/or halogen atoms, particularly fluorine atoms or is 1,4 cyclohexylene and MG is a mesogenic group, or forms a mesogenic group together with ##STR3##
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: January 6, 1998
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: David Coates, Alison Linda May, Jacqueline Dawn Percy