Patents by Inventor Gunter Hotzsch

Gunter Hotzsch 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).

  • Compound body of vacuum-coated sintered material and process for its production
    Patent number: 5698314
    Abstract: Compound body of a vacuum coated sintered material and a process for its production. Such compound bodies, when coated in a known manner, have a carrier of sintered material coated with a layer that is thermally, mechanically and chemically unstable, with their surface showings cracks and being partially porous. These shortcomings are overcome via an improved eco-friendly vacuum deposition process, wherein at least one layer of a material, having an outer layer of Al.sub.2 O.sub.3, is applied to the carrier of sintered material at a maximum of 800.degree. C., with this layer being completely crystalline and comprised of an .alpha.Al.sub.2 O.sub..sub.3 phase and possibly of a .gamma.Al.sub.2 O.sub.3 phase with a (440) texture, having a compressive stress of at least 1 GPa and a hardness of at least 20 GPa, with the Al.sub.2 O.sub.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: December 16, 1997
    Assignee: Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V.
    Inventors: Klaus Goedicke, Gunter Hotzsch, Fred Fietzke, Olaf Zywitzki, Siegfried Schiller, Jonathan Reschke, Wolfgang Hempel
  • Vacuum-coated compound body and process for its production
    Patent number: 5693417
    Abstract: Vacuum coated compound body and a process for its production. Such compound bodies, when coated in a known manner, have a carrier of a metal or of an alloy, a layer that is thermally, mechanically and chemically unstable, with their surface showing cracks and being partially porous. These shortcomings are overcome via an improved eco-friendly vacuum deposition process wherein at least one layer of a material having an outer layer is of Al.sub.2 O.sub.3, is applied to the metal or alloy carrier at a maximum of 700.degree. C., with this layer being completely crystalline and comprised of an .alpha.Al.sub.2 O.sub.3 phase and possibly of a .gamma.Al.sub.2 O.sub.3 phase with a (440) texture, having a compressive stress of at least 1 Gpa and a hardness of at least 20 Gpa, with the Al.sub.2 O.sub.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: December 2, 1997
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Klaus Goedicke, Gunter Hotzsch, Fred Fietzke, Olaf Zywitzki, Siegfried Schiller, Jonathan Reschke, Wolfgang Hempel