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:
Feb. 17, 2004
Filed:
Mar. 22, 2002
Heinz Geier, Leonberg, DE;
Rudolf Pollner, Bamberg, DE;
Ulrich Eisele, Stuttgart, DE;
Peter Wange, Jena, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A glass or glass powder is fused from a starting mixture containing approximately 38 wt % to 48 wt % SO , 15 wt % to 19 wt % Al O , 4.5 wt % to 11 wt % TiO , 0 wt % to 1.5 wt % Na O, 0 wt % to 1.5 wt % K O and 23 wt % to 30 wt % CaO. In addition, a glass powder mixture includes two glass powders, a carbon black powder and an organic binder, the first glass powder having a mean particle size of approximately 150 &mgr;m to 250 &mgr;m, the second glass powder having a mean particle size of less than approximately 100 &mgr;m, which may be 10 &mgr;m to 70 &mgr;m. The glass or glass powder mixture is suitable for producing a glass ceramic, such as that used as a resistor seal and/or a gas-tight glass ceramic solder in a spark plug.