Patents by Inventor Uwe Walz

Uwe Walz 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: 20040167296
    Abstract: The invention concerns macromonomers of a molecular weight of at least M≧500 g/mol containing siloxane groups. The macromonomers are usable as polymerizable monomers in a dental/medical composite comprising further at least a polymerizable monomer, an organic or inorganic acid or an acidic monomer, a stabilizer, an initiator, pigments and an organic or inorganic filler. The dental/medical composite is usable as a dental restorative material for filling and restoring teeth, making inlays and onlays, for artificial teeth, for sealing and surface modification materials, usable as temporary crown and bridge material. Furthermore, the macromonomers are usable for filler surface modification, as precursors for siloxane condensation products or as precursor for preparation of nanoparticles containing active polymerizable moieties.
    Type: Application
    Filed: March 2, 2004
    Publication date: August 26, 2004
    Inventors: Joachim E. Klee, Uwe Walz, Jurgen Fiedler, Rolf Mulhaupt, Holger Frey, Ekkehardt Muh
  • Patent number: 6767936
    Abstract: The invention concerns a dental composition comprising bisacrylamides that are polymerizable by free-radical polymerization and by Michael-addition polymerization with amines. The application of polymerization and addition polymerization with amines opens the possibility to completely reacted materials that have no oxygen inhibited layers. The claimed bisacrylamides have an improved hydrolytic stability.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: July 27, 2004
    Assignee: Dentsply DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Publication number: 20040131995
    Abstract: A process for the preparation of a polymerizable dental composition comprising the steps of
    Type: Application
    Filed: July 11, 2003
    Publication date: July 8, 2004
    Inventors: Joachim E. Klee, Uwe Walz, Andreas Facher, Christoph Weber, Rolf Mulhaupt, Holger Frey, Ekkehard Muh
  • Patent number: 6734223
    Abstract: Dental compositions comprising at least a polymerizable monomer and/or at least a polyaminoester that are prepared by reaction of bis- or polyacrylic esters and amines, pigments, organic and/or inorganic fillers, initiators and stabilizers.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: May 11, 2004
    Assignee: Dentsply DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Publication number: 20040029995
    Abstract: A composition from 0° C. to 40° C. and from 0 percent to 100 percent humidity, comprising from 0.2 to 5 percent by weight of at least a peroxide which decomposes by at most fifty percent by weight of the peroxide within 10 hours at a temperature of at least 75° C., from 0.2 to 3 percent by weight of a metal containing material, from 0.1 to 3 percent by weight of a protected reducing agent. The protected reducing agent is adapted to form an active reducing agent, from 0 to 1 percent by weight of an amine. The composition is formed from peroxide stored at from 0° C. to 40° C. and from 0 percent to 100 percent humidity for at least 24 hours.
    Type: Application
    Filed: August 5, 2003
    Publication date: February 12, 2004
    Applicant: Dentsply DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz
  • Publication number: 20030236342
    Abstract: A low shrinking polymerizable dental material, includes a mixture of a polymerizable di- or poly(meth)acrylate, an alkoxylated bisphenol dimethacrylate, a polymerizable monomer, a polymerization initiator and/or sensitizer, a stabilizer and a filler in a content of 70 to 85 per cent. The volumetric shrinkage during polymerization is less than 2.0 Vol.-%.
    Type: Application
    Filed: April 15, 2003
    Publication date: December 25, 2003
    Applicant: DENTSPLY Research & Development Corp.
    Inventors: Uwe Walz, Joachim E. Klee
  • Patent number: 6660785
    Abstract: The synthesis of self-adhesive polymerizabe monomers and their application as a water containing and a water free self-adhesive dental/medical composite is described. The dental/medical composite comprises a self-adhesive polymerizabe monomer, a polymerizable monomer, an acid-reactive and/or reactive and/or non-reactive filler, a diluent, a polymerization initiator and a stabilizer. As polymerization initiators are used the commonly known thermal initiators, redox initiators and/or photo initiators. The new adhesive dental composite develops adhesion to dentine of about 4 MPa. Fillers of high X-ray absorbance provide radio-opacity values grater than that of the same thickness of aluminium.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: December 9, 2003
    Assignee: Dentsply DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz
  • Publication number: 20030225182
    Abstract: Dental composition having an improved light and thermal stability, including a mixture of at least a polymerizable resin, at least a polymerizable monomer, at least a polymerization initiator and/or a sensitizer and stabilizer, and at least an organic and/or inorganic filler and pigments in a content of 0 to 90 percent and at least one of the stable radicals.
    Type: Application
    Filed: June 2, 2003
    Publication date: December 4, 2003
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Publication number: 20030187094
    Abstract: A composition including nanoparticles each having an acidic polymerizable siloxane moiety. For example, a hydrolysis stable, self-etching, self-priming dental adhesive composition including 90 to 10 percent by weight of an aqueous phase, and 10 to 90 percent by weight of acidic polymerizable nanoparticles. The acidic polymerizable nanoparticles are obtainable by hydrolysis of a mixture containing one or more hydrolyzable organosilicon compounds wherein (i) at least a portion of the hydrolyzable organosilicon compounds contains one or more polymerizable groups and (ii) at least a portion of the hydrolyzable organosilicon compounds contain one or more acidic moieties.
    Type: Application
    Filed: January 14, 2003
    Publication date: October 2, 2003
    Inventors: Joachim E. Klee, Uwe Lehmann, Uwe Walz
  • Publication number: 20030130373
    Abstract: The invention concerns a dental composition comprising bisacrylamides that are polymerizable by free-radical polymerization and by Michael-addition polymerization with amines. The application of polymerization and addition polymerization with amines opens the possibility to completely reacted materials that have no oxygen inhibited layers. The claimed bisacrylamides have an improved hydrolytic stability.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 10, 2003
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Publication number: 20030125412
    Abstract: The invention describes a low shrinking polymerizable dental material, comprising a mixture of a polymerizable resin, a polymerizable monomer, a polymerization initiator and/or sensibilizer and a filler in a content of about 20 to about 85 percent. The volumetric shrinkage during polymerization is less than about 1.5 Vol.-% due to its rheopex behavior.
    Type: Application
    Filed: December 17, 2002
    Publication date: July 3, 2003
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz, Dirk Holter, Armin Burgath, Holger Erey, Rolf Mulhaupt
  • Publication number: 20030105184
    Abstract: Dental compositions comprising at least a polymerizable monomer and/or at least a polyaminoester that are prepared by reaction of bis- or polyacrylic esters and amines, pigments, organic and/or inorganic fillers, initiators and stabilizers.
    Type: Application
    Filed: December 3, 2002
    Publication date: June 5, 2003
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Uwe Walz, Joachim E. Klee
  • Publication number: 20030069327
    Abstract: The invention concerns a dental composition comprising bisacrylamides that are polymerizable by free-radical polymerization and by Michael-addition polymerization with amines. The application of polymerization and addition polymerization with amines opens the possibility to completely reacted materials that have no oxygen inhibited layers. The claimed bisacrylamides have an improved hydrolytic stability.
    Type: Application
    Filed: August 9, 2001
    Publication date: April 10, 2003
    Inventors: Uwe Walz, Joachim E. Klee
  • Publication number: 20030055124
    Abstract: A dental adhesive composition for bonding dental restoratives to dentin and enamel provides a one-part self-etching, self-priming dental adhesive composition having hydrolysis stable polymerizable acidic adhesive monomers.
    Type: Application
    Filed: August 6, 2002
    Publication date: March 20, 2003
    Inventors: Joachim E. Klee, Uwe Walz
  • Publication number: 20030055167
    Abstract: The invention concerns macromonomers of a molecular weight of at least M≧500 g/mol containing siloxane groups. The macromonomers are usable as polymerizable monomers in a dental/medical composite comprising further at least a polymerizable monomer, an organic or inorganic acid or an acidic monomer, a stabilizer, an initiator, pigments and an organic or inorganic filler. The dental/medical composite is usable as a dental restorative material for filling and restoring teeth, making inlays and onlays, for artificial teeth, for sealing and surface modification materials, usable as temporary crown and bridge material. Furthermore, the macromonomers are usable for filler surface modification, as precursors for siloxane condensation products or as precursor for preparation of nanoparticles containing active polymerizable moieties.
    Type: Application
    Filed: August 6, 2002
    Publication date: March 20, 2003
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz, Jurgen Fiedler, Rolf Mulhaupt, Holger Frey, Ekkehardt Muh
  • Patent number: 6503084
    Abstract: A method of venting during sealing the cartridge. The cartridge body has an external wall, a generally cylindrical internal chamber wall having an internal chamber wall diameter and enclosing a cartridge chamber, and at least one channel wall forming a channel (or groove) in the chamber wall. The piston has a generally cylindrical plug wall positioned adjacent to the generally cylindrical internal chamber wall. The cylindrical plug wall has a diameter substantially equal to the diameter of the cylindrical internal chamber wall. Dental material is conveyed into the cartridge chamber. The piston is pressed into the cartridge chamber while venting gas from the cartridge chamber through the channel prior to forming a hermetic seal around the dental material in the cartridge chamber.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: January 7, 2003
    Assignee: Dentsply DeTrey G.m.b.H.
    Inventors: Markus Evers, Uwe Walz, Andreas E. Grützner, Joachim E. Klee
  • Publication number: 20020176826
    Abstract: A composition from 0° C. to 40° C. and from 0 percent to 100 percent humidity, comprising from 0.2 to 5 percent by weight of at least a peroxide which decomposes by at most fifty percent by weight of the peroxide within 10 hours at a temperature of at least 75° C., from 0.2 to 3 percent by weight of a metal containing material, from 0.1 to 3 percent by weight of a protected reducing agent. The protected reducing agent is adapted to form an active reducing agent, from 0 to 1 percent by weight of an amine. The composition is formed from peroxide stored at from 0° C. to 40° C. and from 0 percent to 100 percent humidity for at least 24 hours.
    Type: Application
    Filed: October 18, 1999
    Publication date: November 28, 2002
    Inventors: DR. JOACHIM E. KLEE, UWE WALZ
  • Publication number: 20020147249
    Abstract: A dental composition including a mono- and/or a poly-cyanoacrylate, a polymerizable monomer, a stabilizer, an initiator, and optionally, pigments and a filling material.
    Type: Application
    Filed: May 29, 2002
    Publication date: October 10, 2002
    Applicant: DENTSPLY Research & Development Corp.
    Inventors: Joachim E. Klee, Uwe Walz, Rolf Mulhaupt
  • Publication number: 20020143108
    Abstract: An esterified macromonomer within the scope of the general formula: 1
    Type: Application
    Filed: January 22, 2002
    Publication date: October 3, 2002
    Inventors: Joachim E. Klee, Uwe Walz
  • Publication number: 20020103272
    Abstract: A self-curing dental adhesive has at least one polymerizable resin; at least one polymerizable monomer; at least one polymerizable monomer with an acidic moiety selected from the group 1
    Type: Application
    Filed: April 2, 2002
    Publication date: August 1, 2002
    Applicant: DENTSPLY DeTrey GmbH
    Inventors: Joachim E. Klee, Uwe Walz, Kewang Lu