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:
Nov. 08, 1994
Filed:
Feb. 03, 1993
Applicant:
Inventor:
Yasuyuki Tokunaga, Nagoya, JP;
Assignee:
Narumi China Corporation, Nagoya, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 21 ; 501 66 ;
Abstract
A lead-free frit glaze consisting of, by mole %, 61% or greater SiO.sub.2, 8-10% Al.sub.2 O.sub.3, 0.1-3% CaO, 0.1-2% MgO, 2-5% Li.sub.2 O, 1-4% K.sub.2 O, 2-6% Na.sub.2 O, and 10-15% B.sub.2 O.sub.3. The glaze is applied over the surface of ceramic biscuit base and fired therewith. Although the glaze contains no lead, the lead-free frit glaze provides excellent gloss and excellent quick cooling resistance.