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:
Dec. 15, 2009
Filed:
Mar. 15, 2006
Yukihito Nagashima, Tokyo, JP;
Harunori Murakami, Tokyo, JP;
Yukihito Nagashima, Tokyo, JP;
Harunori Murakami, Tokyo, JP;
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Abstract
A glass composition that has improved infrared absorptivity while preventing the visible light transmittance from decreasing excessively. The glass composition includes: the following components, expressed in mass %: 65<SiO≦75; 0≦BO≦5; 0≦AlO≦5; 0≦MgO<2; 10<CaO≦15; 0≦SrO≦10; 0≦BaO≦10; 0≦LiO≦5; 10≦NaO≦15; 0≦KO≦5; and 0≦TiO≦0.5, where 10<MgO+CaO+SrO+BaO≦20 and 10≦NaO+KO≦17.5; MnO 0 to 300 mass ppm; and the following components as colorants, expressed in mass %: 0.4≦T—FeO≦1.0, where T—FeOis total iron oxide expressed as FeO; and 0≦CeO≦2.0. The mass ratio of FeO expressed as FeOto T—FeOis 20 to 44%. The wavelength at which a minimum transmittance is obtained in a range of 550 to 1700 nm is at least 1065 nm. The transmittance that is obtained at a wavelength of 1650 nm is not higher than the transmittance that is obtained at a wavelength of 730 nm.