Patents by Inventor Robert R. MeLeod

Robert R. MeLeod 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).

  • Optical storage media and method for optical data storage via local changes in reflectivity of a format grating
    Patent number: 6512606
    Abstract: An optical data storage system and method comprising a photopolymer medium having generally a polymerizable monomer, an active binder, a first, hologram recording polymerization initiator, and a second, data writing polymerization initiator. The monomer is preferably a cationic ring-opening monomer. The hologram recording polymerization initiator preferably comprises a sensitizer and photoacid generator which initiate a first polymerization in the medium which defines a format hologram. The format hologram recording is carried out via interference of a signal and reference beam, with the sensitizer being specific for the wavelength(s) of the signal and reference beams. The hologram recording polymerization is only partial and does not consume all of the monomer present in the photopolymer medium.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: January 28, 2003
    Assignee: Siros Technologies, Inc.
    Inventors: Matthew Lipson, Sergei Sochava, Lambertus Hesselink, Brian H. Cumpston, Robert R. MeLeod, Charles D. Claude