US 9,956,806 B1Granted

Security devices

OwnerJohn S. Lettow, Dan Schefferinventors

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Abstract

An article includes a first layer comprising a substrate having one or more images applied thereto. A second layer applied on each image and comprising one or more first and second portions, the first portion and second portions each in communication with a first image area and a second image area of an image, respectively. The second layer comprises a coating composition comprising fully exfoliated single sheets of graphene. The first and second portions comprise first and second detectable properties, respectively, having a value correlated with the graphene. The first and/or second detectable properties each comprise a first X-ray diffraction pattern, a first electrical conductivity, and one or more of a thermal conductivity, an optical property. The first and second detectable properties together create a distinctive signature for the article.

Claims18

Dependent claims

An article, comprising:

a first layer comprising a substrate having an image applied thereto;
a second layer applied on the image, the second layer comprising a first portion and a second portion, the first portion and the second portion in communication with a first image area of the image and a second image area of the image, respectively;
wherein the second layer comprises a coating composition comprising fully exfoliated single sheets of graphene and a multi-chain lipid;
wherein the first portion comprises a first detectable property having a value correlated with the fully exfoliated single sheets of graphene;
wherein the second portion comprises a second detectable property, the first detectable property not equal to the second detectable property, the second detectable property has a second value correlated with the fully exfoliated single sheets of graphene;
wherein the first detectable property comprises a first X-ray diffraction pattern, a first electrical conductivity, and one or more of a thermal conductivity, an optical property;
wherein the second detectable comprises a second X-ray diffraction pattern, a second electrical conductivity, and one or more of a second thermal conductivity, an optical property;
and
wherein the first detectable property and the second detectable property together create a distinctive signature for the article.

6 more elements

A method to enable fabrication of an article, comprising:

prepare a first composition comprising a first plurality of fully exfoliated single sheets of graphene and a first multi-chain lipid, the first composition having a first detectable property, the first detectable property having a first property value associated with the first plurality of fully exfoliated single sheets of graphene;
prepare a second composition comprising a second plurality of fully exfoliated single sheets of graphene and a second multi-chain lipid, the second composition comprising a second detectable property, the second detectable property having a second property value associated with the second plurality of fully exfoliated single sheets of graphene;
applying the first composition on to a first area of an image formed on a surface of a substrate;
applying the second composition on to a second area of the image;
wherein
the first property value is not equal to the second property value;
the first detectable property and the second detectable property together create a distinctive signature for the article;
the first detectable property comprises a first X-ray diffraction pattern, a first electrical conductivity, and one or more of a first thermal conductivity, a first optical property;
and
the second detectable property comprises a first X-ray diffraction pattern, a first electrical conductivity, and one or more of a second thermal conductivity, a second optical property.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/610,790Filed 1 Jun 2017 · continuation
Priority: 15 Nov 2010
Granted: 1 May 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B42D 25/373
Comprising special materials: metallic materials
B42D 15/0073
Printed matter of special format or style not otherwise provided for: characterised by shape or material of the sheets
B42D 25/00
Information-bearing cards or sheet-like structures characterised by identification or security features
B42D 25/21
Characterised by a particular use or purpose: for multiple purposes

Family

Application61/413,968Us provisional application · filed 15 Nov 2010
PCT/US2011/060878Parent of this continuation · filed 15 Nov 2011
Application13/885,673Parent of this continuation
US 9,731,540 B2Parent of this continuation
US 2014/0145426 A1Published application
US 9,956,806 B1This patent

From the US filing history. Foreign family members aren’t listed.