Patents by Inventor Roland Ehrt

Roland Ehrt 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: 9359245
    Abstract: The invention is directed to starting glass compositions for veneer ceramics for dental restorations of framework ceramics comprising yttrium-stabilized zirconium dioxide. It is the object of the invention to make possible a translucent veneer ceramic which has high flexural strength as well as excellent adhesion to the framework ceramic of yttrium-stabilized zirconium dioxide. According to the invention, this object is met in a starting glass for veneer ceramics for dental restorations made of yttrium-stabilized zirconium dioxide which is produced from the following components: a) SiO2 58.0-74.0 percent by weight b) Al2O3 4.0-19.0 percent by weight c) Li2O 5.0-17.0 percent by weight d) Na2O 4.0-12.0 percent by weight e) ZrO2 0.5-6.0 percent by weight.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: June 7, 2016
    Assignee: Ivoclar Vivadent AG
    Inventors: Martina Johannes, Roland Ehrt
  • Publication number: 20150183681
    Abstract: The invention is directed to starting glass compositions for veneer ceramics for dental restorations of framework ceramics comprising yttrium-stabilized zirconium dioxide. It is the object of the invention to make possible a translucent veneer ceramic which has high flexural strength as well as excellent adhesion to the framework ceramic of yttrium-stabilized zirconium dioxide. According to the invention, this object is met in a starting glass for veneer ceramics for dental restorations made of yttrium-stabilized zirconium dioxide which is produced from the following components: a) SiO2 58.0-74.0 percent by weight b) Al2O3 4.0-19.0 percent by weight c) Li2O 5.0-17.0 percent by weight d) Na2O 4.0-12.0 percent by weight e) ZrO2 0.5-6.0 percent by weight.
    Type: Application
    Filed: January 26, 2015
    Publication date: July 2, 2015
    Inventors: Martina Johannes, Roland Ehrt
  • Patent number: 8987153
    Abstract: The invention is directed to veneer ceramics for dental restorations of framework ceramics comprising yttrium-stabilized zirconium dioxide. It is the object of the invention to make possible a translucent veneer ceramic which has high flexural strength as well as excellent adhesion to the framework ceramic of yttrium-stabilized zirconium dioxide. According to the invention, this object is met in a veneer ceramic for dental restorations made of yttrium-stabilized zirconium dioxide which is produced from the following components: a) SiO2 58.0-74.0 percent by weight b) Al2O3 4.0-19.0 percent by weight c) Li2O 5.0-17.0 percent by weight d) Na2O 4.0-12.0 percent by weight e) ZrO2 0.5-6.0 percent by weight.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: March 24, 2015
    Assignee: Ivoclar Vivadent AG
    Inventors: Martina Johannes, Roland Ehrt
  • Publication number: 20140045674
    Abstract: The invention is directed to veneer ceramics for dental restorations of framework ceramics comprising yttrium-stabilized zirconium dioxide. It is the object of the invention to make possible a translucent veneer ceramic which has high flexural strength as well as excellent adhesion to the framework ceramic of yttrium-stabilized zirconium dioxide. According to the invention, this object is met in a veneer ceramic for dental restorations made of yttrium-stabilized zirconium dioxide which is produced from the following components: a) SiO2 58.0-74.0 percent by weight b) Al2O3 4.0-19.0 percent by weight c) Li2O 5.0-17.0 percent by weight d) Na2O 4.0-12.0 percent by weight e) ZrO2 0.5-6.0 percent by weight.
    Type: Application
    Filed: October 16, 2013
    Publication date: February 13, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Martina Johannes, Roland Ehrt
  • Patent number: 8592330
    Abstract: The invention is directed to veneer ceramics for dental restorations of framework ceramics comprising yttrium-stabilized zirconium dioxide. It is the object of the invention to make possible a translucent veneer ceramic which has high flexural strength as well as excellent adhesion to the framework ceramic of yttrium-stabilized zirconium dioxide. According to the invention, this object is met in a veneer ceramic for dental restorations made of yttrium-stabilized zirconium dioxide which is produced from the following components: a) SiO2 58.0-74.0 percent by weight b) Al2O3 ?4.0-19.0 percent by weight c) Li2O ?5.0-17.0 percent by weight d) Na2O ?4.0-12.0 percent by weight e) ZrO2 ?0.5-6.0 percent by weight.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: November 26, 2013
    Assignee: Ivoclar Vivadent AG
    Inventors: Martina Johannes, Roland Ehrt
  • Publication number: 20130149433
    Abstract: A veneering ceramic for dental restorations made of yttrium-stabilized zirconium dioxide comprises, in mass percent: SiO2 55.0-72.5; Nb2O5 6.0-19.8; B2O3 1.0-9.0; Al2O3 1.2-6.0; Li2O 5.0-16.5; Na2O 1.4-11.0; ZrO2 0.5-4.0, or comprises: SiO2 58.0-68.0; Nb2O5 10.0-19.8; Al2O3 1.2-6.0; Li2O 8.0-16.5; Na2O 1.4-8.0; ZrO2 0.5-4.0.
    Type: Application
    Filed: August 18, 2011
    Publication date: June 13, 2013
    Inventors: Roland Ehrt, Martina Johannes
  • Publication number: 20110030423
    Abstract: The invention is directed to veneer ceramics for dental restorations of framework ceramics comprising yttrium-stabilized zirconium dioxide. It is the object of the invention to make possible a translucent veneer ceramic which has high flexural strength as well as excellent adhesion to the framework ceramic of yttrium-stabilized zirconium dioxide. According to the invention, this object is met in a veneer ceramic for dental restorations made of yttrium-stabilized zirconium dioxide which is produced from the following components: a) SiO2 58.0-74.0 percent by weight b) Al2O3 ?4.0-19.0 percent by weight c) Li2O ?5.0-17.0 percent by weight d) Na2O ?4.0-12.0 percent by weight e) ZrO2 ?0.5-6.0 percent by weight.
    Type: Application
    Filed: March 6, 2008
    Publication date: February 10, 2011
    Inventors: Martina Johannes, Roland Ehrt