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. 25, 2003
Filed:
Jun. 21, 2001
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
The ultraviolet/infrared absorbent low transmittance glass has an almost neutral color such as greenish gray, low visible light transmittance, low total solar energy transmittance, and low ultraviolet transmittance, and is suitable for a rear window of a vehicle and capable of protecting privacy. The glass consists of base glass including: 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 between 10 and 20 wt. %; and 0 to 5 wt. % B O , and colorants including: 1.25 to 1.5 wt. % total iron oxide (T—Fe O ) expressed as Fe O ; 0.01 to 0.019 wt. % CoO; more than 0.0008 wt. % and equal to or less than 0.003 wt. % Se; and 0.055 to 0.1 wt. % NiO. The glass with a thickness between 2 and 5 mm has a visible light transmittance (YA) in a range from 10% to 25% using illuminant “A”, a solar energy transmittance in a range from 5% to 20% and an ultraviolet transmittance (Tuv) of not more than 15%.