Patents by Inventor Keith Hanrahan

Keith Hanrahan 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).

  • Process for preparing an optical retardation film
    Patent number: 6262788
    Abstract: The invention relates to a process for preparing an optical retardation film comprising at least one layer of an anisotropic polymer material, to a method of rubbing a substrate for the alignment of liquid crystal or mesogenic material that can be used in the above process, to an optical retardation film obtainable by the above process, to the use of such an optical retardation film in a liquid crystal display, and to a liquid crystal display device comprising a liquid crystal cell and such an optical retardation film.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: July 17, 2001
    Assignee: Merck Patent GmbH
    Inventors: Keith Hanrahan, John Scott, Mark Goulding, Mark Andrew Verrall, David Coates, Nicolas Sharples, Jun Nakanowatari