US 11,745,474 B2
Composite glass with an intermediate film that changes colour depending on the viewing angle
Maik Rudolf Johann Scherer, Grainau (DE); Raphael Dehmel, Neubeuern (DE); Kai Herrmann Scherer, Munich (DE); Daniel Lenssen, Munich (DE); Michael Rahm, Bad Tolz (DE); and Mario Keller, Seebruck (DE)
Assigned to GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
Appl. No. 17/273,265
Filed by GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
PCT Filed Sep. 2, 2019, PCT No. PCT/EP2019/025290
§ 371(c)(1), (2) Date Mar. 3, 2021,
PCT Pub. No. WO2020/048638, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 10 2018 007 108.2 (DE), filed on Sep. 7, 2018.
Prior Publication US 2021/0339504 A1, Nov. 4, 2021
Int. Cl. B32B 17/10 (2006.01); B44F 1/06 (2006.01); B44F 1/10 (2006.01); C09B 67/00 (2006.01); C09K 19/02 (2006.01)
CPC B32B 17/10504 (2013.01) [B32B 17/1022 (2013.01); B32B 17/10036 (2013.01); B44F 1/066 (2013.01); B44F 1/10 (2013.01); C09B 67/0098 (2013.01); C09K 19/02 (2013.01); B32B 17/1044 (2013.01); B32B 17/10651 (2013.01); B32B 2250/03 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/414 (2013.01); B32B 2307/416 (2013.01); B32B 2307/42 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A composite glass comprising:
a first plate, the first plate being a glass plate or a plastic plate;
a second plate, the second plate being a glass plate or a plastic plate; and
an intermediate foil arranged between the first plate and the second plate,
wherein the composite glass, due to the intermediate foil, is configured in a side-dependent manner by appearing to a viewer more transparent from a first side than viewed from a second side,
wherein the composite glass, due to the intermediate foil, is configured in an angle-dependent manner from the second side by appearing different from a first angle on the second side than from a second angle on the second side, and
wherein the intermediate foil comprises an interference layer construction, the interference layer construction comprising at least three sublayers, at least one color hue being determined by the thickness of a spacer layer.