Patents by Inventor Janet P. Tilley

Janet P. Tilley 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).

  • Patent number: 4267229
    Abstract: A colored acrylic sheet having an attractive 3-dimensional depth of color resulting from the use of a mixture of pigments or a pigment and a dye wherein an inorganic pigment, distributed non-uniformly throughout the sheet and a colorant is distributed uniformly through the sheet, the particles of non-uniformly distributed pigment being concentrated preferentially towards one surface of the sheet and are visible through the opposite surface of the sheet which is preferably substantially free from the non-uniformly distributed pigment. The attractive appearance is further enhanced by shaping the sheet and the sheet is particularly suitable for forming articles of sanitaryware.
    Type: Grant
    Filed: October 30, 1978
    Date of Patent: May 12, 1981
    Assignee: Imperial Chemical Industries Limited
    Inventors: Peter A. Knight, Janet P. Tilley