Patents by Inventor Ottmar Komma

Ottmar Komma 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).

  • Silicate dental ceramic-based blasting medium
    Patent number: 6176887
    Abstract: A silicate dental ceramic-based blasting medium for the improvement of the adhesive bond between fire-on ceramic and alloy. In contrast to the traditionally used Al2O3 blasting medium, the complete sealing of the alloy-ceramic contact layer is guaranteed. In this way, the penetration of moisture (from the milieu of the mouth) in the contact layer is prevented. The phenomenon of bubble formation known from practice in dental work worn on a trial basis can thus be stopped after correction firing.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: January 23, 2001
    Assignees: Degussa H{umlaut over (u)}ls Aktiengesellschaft, Ducera Dental-GmbH & Co. KG
    Inventor: Ottmar Komma
  • Dental ceramic material with a relatively low processing temperature
    Patent number: 5346866
    Abstract: A dental ceramic material is disclosed for the preparation and repair of metal ceramic and fully ceramic dentures, which has a processing temperature of 660.degree..+-.30.degree. C., and has the following composition: 60 to 65% by weight of SiO.sub.2, 8.5 to 11% by weight of Al.sub.2 O.sub.3, 8 to 12% by weight of K.sub.2 O, 10.5 to 12% by weight of Na.sub.2 O, 0.7 to 2% by weight of CaO, 0.5 to 2.5% by weight of B.sub.2 O.sub.3, 0.1 to 0.6% by weight of Sb.sub.2 O.sub.3, 0 to 0.5% by weight of CeO.sub.2, 1.0 to 3.8% by weight of TiO.sub.2, 0.8 to 1.4% by weight of Li.sub.2 O, and 0.6 to 2.4% by weight of F.sub.2.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: September 13, 1994
    Assignees: Degussa Aktiengesellschaft, Ducera Dental Gesellschaft mbH
    Inventors: Ottmar Komma, Juergen Steidl
  • Ceramic material for veneering metallic dental protheses
    Patent number: 5308391
    Abstract: Ceramic masses with processing temperatures of approximately 770.degree. C. and coefficients of thermal expansion of 8-9.multidot.10.sup.-6 K.sup.-1 and 16-17.5.multidot.10.sup.-6 K.sup.-1 are required for dental prostheses consisting of low-melting gold alloys and titanium alloys for their veneering. Such ceramic masses are composed of 60 to 75% by weight SiO.sub.2, 4 to 15% by weight Al.sub.2 O.sub.3, 0.7 to 2.5% by weight B.sub.2 O.sub.3, 0 to 0.9% by weight Sb.sub.2 O.sub.3, 0 to 0.5% by weight CeO.sub.2, 0 to 2.5% by weight BaO, 0 to 0.5% by weight CaO, 7 to 12% by weight K.sub.2 O, 6 to 11% by weight Na.sub.2 O, 0.55 to 1.4% by weight Li.sub.2 O and 0.2 to 1.0% by weight F.sub.2.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: May 3, 1994
    Assignee: Ducera Dental-Gesellschaft mbH
    Inventors: Ottmar Komma, Juergen Steidl
  • Dental ceramic material with a relatively low processing temperature
    Patent number: 5281563
    Abstract: A dental ceramic material is disclosed for the preparation and repair of metal ceramic and fully ceramic dentures, which has a processing temperature of 660.+-.30.degree. C., and has the following composition: 60 to 65% by weight of SiO.sub.2, 8.5 to 11% by weight of Al.sub.2 O.sub.3, 8 to 12% by weight of K.sub.2 O, 10.5 to 12% by weight of Na.sub.2 O, 0.7 to 2% by weight of CaO, 0.6 to 2% by weight of BaO, 0.5 to 2.5% by weight of B.sub.2 O.sub.3, 0.1 to 0.6% by weight of Sb.sub.2 O.sub.3, 0 to 0.5% by weight of CeO.sub.2, 1.2 to 3.8% by weight of TiO.sub.2, 0.8 to 1.4% by weight of Li.sub.2 O, and 1.2 to 3.8% by weight of F.sub.2.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: January 25, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Ottmar Komma, Juergen Steidl