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ARTICLE · 24 AUGUST 2021

"Contact" Means "Contact" – Patenting Layers

Ex parte Hwang, is a recent decision of the Patent Trial and Appeal Board (PTAB) addressing whether a claimed sequence of layers was rendered obvious by a similar sequence of layers in the prior art.

United StatesIntellectual Property

Ex parte Hwang, is a recent decision of the Patent Trial and Appeal Board (PTAB) addressing whether a claimed sequence of layers was rendered obvious by a similar sequence of layers in the prior art.

In Ex parte Hwang, the claim at issue was directed to a barrier film used to protect a display device, such as a liquid crystal, electronic ink, or organic light emitting diode (OLED) type device. The relevant claim recited, in part:

A barrier film comprising:

a stacked sheet having a top surface and a bottom surface and comprising:

at least two first layers formed of a semicovalent inorganic material; and

at least one second layer formed of an ionic inorganic material,

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