Electrically heatable laminated window

Claim 2

A transparent, laminated window having improved defrosting capability and reduced oblique viewing angle color reflectance comprising: (A) an optical element having a sheet resistivity less than about 6 ohms per square and less than about 11% normal incidence reflection of at any wavelength between 400 and 700 nm, containing: (i) at least two transparent, electrically conductive layers, each having a thickness of less than 150 angstroms; (ii) at least one dielectric layer between said conductive layers; (iii) a transparent substrate; and (B) a bus bar electrically conductively associated with each conductive layer.

Claim 3

The window of claim 1 wherein sheet resistivity is less than about 3 ohms per square.

Claim 4

The window of claim 1 wherein the thickness of each conductive layer is between 60 and 150 angstroms.

Claim 5

The window of any of claims 1, 2 or 3 wherein each conductive layer is silver.

Claim 6

The window of claim 4 wherein the dielectric layers are titanium dioxide.

Claim 7

The window of claim 5 including flexible plastic layers within which the optical element is encapsulated.

Claim 8

The window of claim 6 wherein the flexible plastic comprises polyvinyl butyral.

Claim 9

A transparent, laminated window capable of transmitting at least 70% of visible light and having improved defrosting capability and reduced oblique viewing angle color reflectance comprising: (A) an optical element having a sheet resistivity less than about 3 ohms per square and less than 11% normal incidence reflection at any wavelength between 400 and 700 nm light, said optical element comprising: (i) at least two silver layers, each having a thickness of 100-130 angstroms; (ii) at least one dielectric layer between said silver layers; (iii) at least one dielectric layer against the exterior surfaces of the silver layers opposite to those in contact with the layers of (ii); (iv) a transparent substrate; and (B) a bus bar electrically conductively associated with each silver layer.

Claim 10

A transparent, laminated window capable of transmitting at least 70% of visible light and having improved defrosting capability and reduced oblique viewing angle color reflectance comprising: (A) an optical element having a sheet resistivity less than about 3 ohms per square and less than 11% normal incidence reflection at any wavelength between 400 and 700 nm light, said optical element comprising: (i) at least two silver layers, each having a thickness of 100-130 angstroms; (ii) at least one dielectric layer between said silver layers; (iii) at least one dielectric layer against the exterior surfaces of the silver layers opposite to those in contact with the layers of (ii); (iv) a transparent substrate; and (B) a bus bar electrically conductively associated with each silver layer.