Patent ID: 8665512
Filing Date: 2014-03-04
Classification: C03C,E06B,G02F,H05B

Abstract:
1. A three-pane window unit comprising: a first substantially transparent substrate and a first two-state electrochromic device disposed thereon; a second substantially transparent substrate and a second two-state electrochromic device disposed thereon; a third substantially transparent substrate; a first sealing separator between the first and second substantially transparent substrates, the first sealing separator defining, with the first and second substantially transparent substrates, a first inner region; and a second sealing separator between the second and third substantially transparent substrates, the second sealing separator defining, with the second and third substantially transparent substrates, a second inner region, wherein at least one of the first and second inner regions is thermally insulating, wherein the three-pane window unit has at least four optical states, and wherein at least one of the second and third substantially transparent substrates has a heatable transparent conductive oxide layer disposed thereon.