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. 04, 2006
Filed:
Dec. 02, 2003
Hiroyuki Minamikawa, Sagamihara, JP;
Kazuo Ohara, Yokohama, JP;
Naoyuki Goto, Machida, JP;
Kabushiki Kaisha Ohara, Kanagawa-Ken, JP;
Abstract
There are provided low expansion transparent glass-ceramics obtained by heat treating a base glass produced at a relatively low melting temperature of 1530° C. or below. The glass-ceramics have an average linear thermal expansion coefficient within a range from +6×10/° C. to +35×10/° C., 80% transmittance wavelength (T) of 700 nm or below internal transmittance of 75% or over at light wavelength of 1550 nm, heat resisting temperature of 800° C. or over and Young's modulus of 90 GPa or over. The glass-ceramics comprise SiO, AlO, MgO, CaO, BaO, ZnO, LiO, TiOand ZrOand contain β-quartz or β-quartz solid solution as a predominant crystal phase.