Patents by Inventor Raymond Denman

Raymond Denman 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).

  • Liquid crystalline polyesters for optical data storage
    Patent number: 5262081
    Abstract: The invention comprises liquid crystalline polyesters suited to be used as a medium for optical data storage, especially reversible (or erasable) optical data storage. The polyesters comprise the polycondensation product of an aliphatic dicarboxylic acid or a derivative thereof and propane diol which on its center carbon bears a mesogenic substituent comprising two rings, either alicyclic or aromatic. Preferably also the dicarboxylic acid or derivative thereof is mesogenically substituted. The invention further comprises a medium for optical data storage containing polyesters of the above type.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: November 16, 1993
    Assignee: Akzo N.V.
    Inventors: George W. Gray, Andrew M. McRoberts, Raymond Denman, Richard M. Scrowston, David Lacey