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. 11, 2001
Filed:
Dec. 02, 1999
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
An ultraviolet/infrared absorbent low transmittance glass is formed of a base glass and colorants. The base glass contains 65 to 80 wt. % SiO,; 0 to 5 wt. % Al,O,; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is between 5 and 15 wt. %; 10 to 18 wt. % Na,O; 0 to 5 wt. % K,O wherein a total amount of Na,O and K,O is in a range of 10 and 20 wt. %; and 0 to 5 wt. % B,O,. The colorants contains more than 1.2 wt. % and not more than 1.5 wt. % total iron oxide (T-Fe,O,) expressed as Fe,O,; equal to or more than 0.003 wt. % and less than 0.015 wt. % CoO; 0.0009 to 0.005 wt. % Se; 0.0005 to 0.05 wt. % NiO; and 0 to 0.2 wt. % of TiO,, wherein FeO expressed as Fe,O,is between 15 and 50 wt. % of T-Fe,O,. The ultraviolet/infrared absorbent low transmittance glass has a bronze or gray color shade, low visible light transmittance, low solar energy transmittance and low ultraviolet transmittance, so that it is useful for a privacy protecting glass in a rear window of a vehicle.