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:
Jul. 08, 2014
Filed:
Mar. 12, 2012
Martin Letz, Mainz, DE;
Stephan Knoener, Herford, DE;
Martina Dressler, Mainz, DE;
Daniela Seiler, Alzey, DE;
Bernd Hoppe, Ingelheim, DE;
Michael Kluge, Offenbach a. M., DE;
Martin Letz, Mainz, DE;
Stephan Knoener, Herford, DE;
Martina Dressler, Mainz, DE;
Daniela Seiler, Alzey, DE;
Bernd Hoppe, Ingelheim, DE;
Michael Kluge, Offenbach a. M., DE;
Schott AG, Mainz, DE;
Abstract
A glass-ceramic having at least two crystal phases, wherein at least one crystal phase has a positive temperature dependence of the resonance frequency τ, at least one crystal phase has a negative temperature dependence of the resonance frequency τand the glass-ceramic has a resulting temperature dependence of the resonance frequency τof 0 ppm/K with a maximum deviation of +/−20 ppm/K, is described. Furthermore, a process for producing such a glass-ceramic and the use of the glass-ceramic are described.