Patents by Inventor Rudolf J. Michl

Rudolf J. Michl 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).

  • Patent number: 5213615
    Abstract: A dental material for the control of caries and paradentitis is described, which contains an active agent combination of thymol and/or carvacrol and chlorhexidine and/or the physiologically compatible salts thereof.The dental material can be a dental varnish or a material such as a dental cement and the like, which remains in the oral cavity for a long period and from which the active combination can diffuse out.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: May 25, 1993
    Assignee: Ivoclar AG
    Inventor: Rudolf J. Michl
  • Patent number: 4787850
    Abstract: A process for producing artificial teeth or parts thereof is given, in which a mass of at least one polyfunctional isocyanate, at least one polyol and at least one methacrylate monomer, as well as in each case one catalyst for the polymerization of the methacrylate monomer and for the acceleration of the formation of a urethane is hardened in a first stage to an elastic blank, which can then be cured in a second stage to artificial teeth or parts thereof. A storage-stable dental material for performing the process comprises two components, namely at least one polyfunctional isocyanate as the first component and the remaining constituents as the second component.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: November 29, 1988
    Assignee: Uexkull & Stolberg
    Inventors: Rudolf J. Michl, Peter Wollwage, Gerhard Zanghellini
  • Patent number: 4629746
    Abstract: Apart from polymerizable organic binders, a radiopaque dental material contains a fluoride of the rare earth metals or mixtures of such fluorides, as well as optionally further inorganic compounds as fillers. The dental material is suitable as a one or two-component filling material for dental cement, as a crown and bridge material, as well as for producing dentures, inlays and implants and is characterized by a high radiopacity and at the same time a good transparency.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: December 16, 1986
    Assignee: Etablissement Dentaire Ivoclar
    Inventors: Rudolf J. Michl, Volker M. Rheinberger, Gilbert Ott