Patents by Inventor Marion J. Roberts

Marion J. Roberts 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).

  • Polarized films from pairwise-deposited semi-ionomeric syndioregic polymers
    Patent number: 6114031
    Abstract: This invention is comprised of new nonlinear optic polymers and a new Lanir-Blodgett (LB) film deposition scheme for which these polymers were designed. The invention is unique because it produces an electro-optic film which has never undergone electric-field poling nor high temperature treatment. It eliminates the dilution effect of the long hydrophobic alkyl groups, and creates stronger ionic bonds between the polymer chains. Finally, the invention reduces the time to make a film of a given thickness by at least half by virtue of depositing two polymer layers per stroke. The new polymers are comprised of asymmetric chromophores linked head-to-head by alternating two different kinds of bridging groups. One of the bridging groups contains one or more ionic groups, and the other bridging group contains one or more non-ionic, hydrophilic groups.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: September 5, 2000
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marion J. Roberts, John D. Stenger-Smith, Kenneth J. Wynne, Peter Zarras, Andrew P. Chafin, Richard A. Hollins, Geoffrey A. Lindsay
  • Nonlinear optical films from pair-wise-deposited semi-ionomeric syndioregic polymers
    Patent number: 5882785
    Abstract: This invention is comprised of new nonlinear optic polymers and a new Lanir-Blodgett (LB) film deposition scheme for which these polymers were designed. The invention is unique because it produces an electro-optic film which has never undergone electric-field poling nor high temperature treatment. It eliminates the dilution effect of the long hydrophobic alkyl groups, and creates stronger ionic bonds between the polymer chains. Finally, the invention reduces the time to make a film of a given thickness by at least half by virtue of depositing two polymer layers per stroke. The new polymers are comprised of asymmetric chromophores linked head-to-head by alternating two different kinds of bridging groups. One of the bridging groups contains one or more ionic groups, and the other bridging group contains one or more non-ionic, hydrophilic groups.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: March 16, 1999
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Richard A. Hollins, Geoffrey A. Lindsay, Marion J. Roberts, Peter Zarras, John D. Stenger-Smith, Kenneth J. Wynne, Andrew P. Chafin