US 12,145,877 B2
Coated glazing
John William Oldfield, St. Helens (GB); and Srikanth Varanasi, Ottawa Hills, OH (US)
Assigned to Pilkington Group Limited, Lathom (GB)
Appl. No. 17/910,066
Filed by PILKINGTON GROUP LIMITED, Lathom (GB)
PCT Filed Mar. 11, 2021, PCT No. PCT/EP2021/056258
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/180888, PCT Pub. Date Sep. 16, 2021.
Claims priority of provisional application 62/988,557, filed on Mar. 12, 2020.
Prior Publication US 2023/0098954 A1, Mar. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 17/34 (2006.01)
CPC C03C 17/3417 (2013.01) [C03C 2217/71 (2013.01); C03C 2217/734 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A coated glazing comprising:
a transparent glass substrate, and a coating located on the glass substrate,
wherein the coating comprises at least the following layers in sequence starting from the glass substrate:
a first layer having a refractive index of more than 1.6,
an optional second layer having a refractive index that is less than the refractive index of the first layer,
a third layer based on tin dioxide doped with antimony, niobium and/or neodymium, wherein the third layer has a thickness of at least 160 nm, and
a fourth layer based on titanium dioxide, wherein the fourth layer is photocatalytic.