Patents by Inventor Denis J. O'Sullivan

Denis J. O'Sullivan 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).

  • Dental filling composition
    Patent number: 4243578
    Abstract: An improved dental filling material is prepared from polymerizable urethane-acrylate resins which cure by a free-radical mechanism to form hard and durable filling compositions which bond strongly and adhesively to tooth enamel, to dentin, to dental prostheses and to preexisting dental filling materials.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: January 6, 1981
    Assignee: Loctite Corporation
    Inventors: Denis J. O'Sullivan, Bernard J. Bolger, T. Eisirt Casey
  • Peroxide initiated polymerizable acrylate-isocyanate monomer compositions
    Patent number: 4043982
    Abstract: This invention relates to polymerizable compositions, which serve as adhesives, sealants, potting compounds, etc., the primary components of which are an acyl peroxide initiator, an arylamine polymerization accelerator, and a polymerizable acrylate-isocyanate monomer.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: August 23, 1977
    Assignee: Loctite (Ireland) Limited
    Inventors: Denis J. O'Sullivan, Bernard J. Bolger, T. Eisert Casey
  • High viscosity cyanoacrylate adhesive compositions, and process for their preparation
    Patent number: 4038345
    Abstract: Stable cyanoacrylate adhesive compositions having viscosities greater than about 200 centipoise are prepared by incorporating therein, as a thickening agent, a soluble acrylic polymer having a reduced viscosity of about 5 or greater, and a content of free radical polymerization initiator less than 1% by weight. These properties are obtained by subjecting the thickening agent to temperatures of about 140.degree.-180.degree. C. for about 30-180 minutes prior to incorporating it in the cyanoacrylate.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: July 26, 1977
    Assignee: Loctite (Ireland), Limited
    Inventors: Denis J. O'Sullivan, Bernard J. Bolger
  • Dental filling method and composition formed thereby
    Patent number: 3931678
    Abstract: A process for repairing dental caries which comprises:A. Removing decayed tooth structure to form a dental cavity;B. Filling said cavity with a dental filling composition comprising1. A free-radical polymerizable acrylate monomer;2. A free radical polymerization initiator; and3. An inorganic filler;C. Applying an aqueous solution of waterglass to the surface of the composition and allowing the water to evaporate to leave a solid, essentially oxygen-impermeable coating of waterglass;D. Permitting said composition to harden to form a restored dental surface; andE. Washing off the waterglass coating with water.
    Type: Grant
    Filed: September 24, 1974
    Date of Patent: January 13, 1976
    Assignee: Loctite (Ireland) Limited
    Inventors: Denis J. O'Sullivan, T. Eisirt Casey