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:
Sep. 14, 2010
Filed:
Aug. 18, 2004
Dietmar Wennemann, Albig, DE;
Harald Striegler, Ockenheim, DE;
Dietmar Wennemann, Albig, DE;
Harald Striegler, Ockenheim, DE;
Schott AG, Mainz, DE;
Abstract
The black-colored glass ceramic panel has a cooking surface provided with a smooth black decoration by burning in a decorative paint, which contains a colorless zinc-containing glass flux and up to 10 wt. % of a partially coated pigment. The partially coated pigment consists of 20 to 40 wt. % of a black pigment with a grain size of at most 5μ and a grain size distribution characterized by a D<2μ and 60 to 80% by weight of a zinc-free boro-alumino-silicate glass coating the black pigment. The glass flux consists, in wt. %, of LiO, 0-5; NaO, 0-5; KO, <2; ΣLiO+NaO+KO, 1-10; MgO, 0-3; CaO, 0-4; SrO, 0-4; BaO, 0-4; ZnO, >0-4; BO, 15-27; AlO, 10-20; SiO, 43-58; TiO, 0-3; ZrO, SbO, 0-2; F, 0-3.