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:
Jun. 11, 2013
Filed:
Mar. 20, 2008
John Buckett, High Legh, GB;
Keith Haughey, Liverpool, GB;
Neil Mcsporran, Liverpool, GB;
Pilkington Group Limited, St. Helens, Merseyside, GB;
Abstract
Flat glass composition comprising the following (expressed as percentages by weight): SiO60 75%; AlO0 5%; NaO 10 18%; KO 0 5.5%; CaO 0 5%; MgO 0-2%; SO0 1%; FeO(total iron)>0.01%; TiO0-1% and one or both of: SrO 0-15%; BaO 0-15% with the proviso that the summed amount of SrO and BaO is greater than 4%. A preferred composition comprises: SiO65-74%; AlO0-3%; NaO 13 16%; KO 0-2%; CaO 1-4.9%; MgO 0-2%; SO0-1%; FeO(total iron)>0.01%; TiO0 1%; BaO 4-10%; SrO 0-5%, wherein the summed amount of the alkaline earth metal constituents is in the range 10-13% and the summed amount of the alkali metal constituents is in the range 14-16%. The ferrous level of the glass may be greater than or equal to 28%, its performance in a thickness of 5 mm or less may be greater than or equal to 29 at LT≧70%, and greater than or equal to 27 at LT≧75%, and its liquidus temperature may be less than or equal to 980° C.