The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1988
Filed:
Aug. 08, 1986
Christine Abert, Berlin, DD;
Eggert Beleites, Maua, DD;
Gunter Carl, Jena-Lobeda, DD;
Steffen Grosse, Berlin, DD;
Hilmar Gudziol, Jena, DD;
Wolfram Hoeland, Jena-Lobeda, DD;
Michael Hopp, Binz, DD;
Ralf Jacobi, Goerlitz, DD;
Harry Jungto, Jena, DD;
Guenther Knak, Berlin, DD;
Lutz Kreisel, Jena, DD;
Rudolf Musil, Jena, DD;
Karin Naumann, Jena, DD;
Frank Vogel, Brandenburg, DD;
Werner Vogel, Jena, DD;
Veb Jenaer Glaswerk, Jena, DD;
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