Patents by Inventor Thomas Volkel

Thomas Volkel 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).

  • Publication number: 20020082315
    Abstract: The invention relates to urethane di(meth)acrylate derivatives of 1-3-bis(1-isocyanato-1-methylethyl)benzene according to Formula (I) 1
    Type: Application
    Filed: January 25, 1999
    Publication date: June 27, 2002
    Inventors: NORBERT MOSZNER, VOLKER RHEINBERGER, THOMAS VOLKEL, URS KARL FISCHER
  • Patent number: 6281271
    Abstract: The invention relates to a dental material with at least one polymerizable binder and at least one filler containing a redox-initiator system for the radical polymerization, which comprises an initiator and an activator. The material is characterized in that the filler contains a homogeneous mixture of a first part of the filler, which is mixed with the initiator, a second part of the filler, which is mixed with the activator, and a third part of the filler, which does not contain a component of the initiator system. The materials are particularly suitable as cements and filling materials.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: August 28, 2001
    Assignee: Ivoclar AG
    Inventors: André Rumphorst, Ulrich Salz, Alexandros Gianasmidis, Thomas Völkel, Volker Rheinberger, Norbert Moszner
  • Patent number: 6057383
    Abstract: The invention relates to dental materials based on wax-like polymerizable substances. The dental materials contain (a) 0 to 70 wt. % of at least one polymerizable monomer and/or oligomer; (b) 0.1 to 5 wt. % of at least one polymerization initiator; (c) 0 to 60 wt. % of one or more fillers, (d) at least 20 wt. % of the wax-like polymerizable substance. They can be kneaded at room temperature and can be modelled in non-polymerized state without additional heating, like conventional waxes. On polymerization, the wax component is covalently incorporated into the polymer. The dental materials are suitable for producing temporary and permanent dental prostheses.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: May 2, 2000
    Assignee: Ivoclar AG
    Inventors: Thomas Volkel, Gerhard Zanghellini, Karl Fischer, Norbert Moszner, Volker Rheinberger