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. 15, 2022
Filed:
Jun. 06, 2018
Eurokera, Jouarre, FR;
Marie Comte, Fontenay aux Roses, FR;
Tiphaine Ogier, Paris, FR;
EUROKERA, Jouarre, FR;
Abstract
The present application provides LAS type transparent glass-ceramics of β-quartz of composition containing a high content of zinc, articles constituted at least in part of said glass-ceramics, glasses precursors of said glass-ceramics (with a low viscosity at high temperature), and also a method of preparing said articles. Said glass-ceramics present a composition, free of arsenic oxide and antimony oxide, except for inevitable traces, expressed as percentages by weight of oxides, containing: 64.5% to 66.5% of SiO; 19.0% to 20.6% of AlO; 3.0% to 3.6% of LiO; 0 to 1% of MgO; 1.7% to 3.4% of ZnO; 2% to 3% of BaO; 0 to 3% of SrO; 0 to 1% of CaO; 2% to 4% of TiO; 1% to 2% of ZrO; 0 to 1% of NaO; 0 to 1% of KO; with NaO+KO+BaO+SrO+CaO≤6%; optionally up to 2% of at least one fining agent comprising SnO; and optionally up to 2% of at least one coloring agent.