Patents by Inventor Eggert Beleites

Eggert Beleites 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).

  • Micaceous-cordierite-glass ceramic
    Patent number: 4789649
    Abstract: Micaceous-cordierite-glass ceramic particularly suitable for stomatological, head surgery and neck surgery applicatiosn has a fracture toughness K.sub.IC of up to 2.0 MPa m.sup.1/2, a hardness HV.sub.0.07 of 300-1000, a compressive strength of up to 450 N/mm.sup.2, a linear thermal expansion coefficient of 75-125.times.10.sup.-7 K.sup.-1, good chemical stability and excellent machinability as well as a high resistance to wear and comprises a composition in weight percentages of______________________________________ SiO.sub.2 43-50 Al.sub.2 O.sub.3 26-30 MgO 11-15 R.sub.2 O 7-10.5 F.sup.- 3.3-4.8 Cl.sup.- 0.01-0.6 CaO 0.1-3 P.sub.2 O.sub.5 0.1-5 ______________________________________wherein R.sub.2 O is the sum of 3 to 5.5 wt. % Na.sub.2 O and 4 to 6 wt. % K.sub.2 O, a first crystal phase of mica, and a second crystal phase of 5 to 30 volume % cordierite, wherein relatively large mica crystals of 10 to 200 .mu.m are embedded in the glass and cordierite crystals of 0.5 to 5 .mu.m are arranged in the glass.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: December 6, 1988
    Assignee: Veb Jenaer Glaswerk
    Inventors: Christine Abert, Eggert Beleites, Gunter Carl, Steffen Grosse, Hilmar Gudziol, Wolfram Hoeland, Michael Hopp, Ralf Jacobi, Harry Jungto, Guenther Knak, Lutz Kreisel, Rudolf Musil, Karin Naumann, Frank Vogel, Werner Vogel
  • Inorganic-organic compound substances for biomedical purposes
    Patent number: 4731394
    Abstract: The invention relates to inorganic-organic compound substances useful for biomedical purposes. The object of the invention is to develop inorganic-organic compound materials which overcome the disadvantages of the state of art, wherein inorganic-organic compound substances for biomedical purposes possess to a large extent specifically adjustable characteristics. Inorganic initial substances form a new solid chemical compound with organic initial substances. The inorganic initial component consists of a biocompatible silicate glass and/or a silicate glass ceramic of the system SiO.sub.2 -Al.sub.2 O.sub.3 -MgO-Na.sub.2 O/K.sub.2 O-F.sup.-, and/or a bioactive phosphate silicate glass and/or a phosphate silicate glass ceramic of the system SiO.sub.2 -Al.sub.2 O.sub.3 -MgO-Na.sub.2 O/K.sub.2 O-CaO-P.sub.2 O.sub.5 F.sup.- and/or of the system SiO.sub.2 -MgO-K.sub.2 O-F.sup.- -CaO-P.sub.2 O.sub.5, and/or a bioactive phosphate glass and/or a phosphate glass ceramic of the system P.sub.2 O.sub.5 -Al.sub.2 O.sub.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: March 15, 1988
    Assignee: Friedrich-Schiller-Universitaet Jena
    Inventors: Werner Vogel, Guenther Heublein, Wolfram Hoeland, Manfred Boese, Karin Naumann, Gunter Carl, Juergen Vogel, Peter Wange, Jens Gummel, Peter Zinner, Eggert Beleites, Thomas Schubert