Patents by Inventor Dennis A. Repella

Dennis A. Repella 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).

  • Hydrophilic polymers and contact lenses made therefrom
    Patent number: 4536554
    Abstract: An interpenetrating network polymer is obtained by mixing hydrophilic monomer vinyl pyrrolidone and hydrophobic monomer (5-alkylene-m-dioxanyl) acrylic ester in the presence of at least two crosslinking agents and, optionally, hydroxyalkyl acrylic ester and catalysts and causing polymerization to occur. Contact lenses made from the polymer have high tensile strength and can absorb a high degree of water.
    Type: Grant
    Filed: February 22, 1984
    Date of Patent: August 20, 1985
    Assignee: Barnes-Hind, Inc.
    Inventors: Drahoslav Lim, Chidambar L. Kulkarni, Dennis A. Repella