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OwnerNabil M. Lawandy, Marianne Krieg-Kowald +1inventors
InventorsNabil M. Lawandy, Marianne Krieg-Kowald, Andrei Smuk
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An optically readable media and packaging therefor, where the media includes a material that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media. The media is sealed within the packaging with a source of a chemical compound that inhibits the change, and the media is also sealed within the packaging with a getter of the chemical compound that over time absorbs said chemical compound, or which a substance that over time renders unreactive a reactive chemical compound. In a further embodiment the media is sealed within the packaging with a getter of a chemical compound that promotes the change. In this case the getter absorbs the chemical compound until saturated with the chemical compound, after which the concentration of the chemical compound increases until the media is rendered unreadable. As non-limiting examples, the chemical compound may be NMP, DMF, acetone, or HCl. In another embodiment the media further includes a diffusion barrier that inhibits but does not prevent the chemical compound from reaching a layer of the media that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, while in another embodiment the source of the chemical compound includes the diffusion barrier. In a further embodiment the media includes a first layer that over time undergoes the at least one of a chemical change or a physical change, a second layer that contains the source of a chemical compound that promotes the change, and the diffusion barrier is interposed between the first layer and the second layer.
An optically readable media and packaging therefor, said media comprising a material that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, said media being sealed within said packaging with a source of a chemical compound that inhibits said change, said media further being sealed within said packaging with a getter of said chemical compound that over time absorbs said chemical compound.
An optically readable media and packaging therefor, said media comprising a material that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, said media being sealed within said packaging with a source of a reactive chemical compound that inhibits said change, said media further being sealed within said packaging with a substance that over time renders unreactive said reactive chemical compound.
An optically readable media and packaging therefor, said media comprising a material that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, said media being sealed within said packaging with a source of a chemical compound that promotes said change, said media further being sealed within said packaging with a getter of said chemical compound that absorbs said chemical compound until saturated with said chemical compound, after which the concentration of said chemical compound increases until the media is rendered unreadable.
An optically readable media and packaging therefor, said media comprising a layer that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, said media being sealed within said packaging with a source of a chemical compound that promotes said change, said media further comprising a diffusion barrier that inhibits, but does not prevent, said chemical compound from reaching said layer.
An optically readable media and packaging therefor, said media comprising a layer that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, said media being sealed within said packaging with a source of a chemical compound that promotes said change, said source comprising a diffusion barrier that inhibits, but does not prevent, said chemical compound from reaching said layer.
An optically readable media, said media comprising a first layer that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, said media comprising a second layer that contains a source of a chemical compound that promotes said change, said media further comprising a diffusion barrier that is interposed between said first layer and said second layer that inhibits, but does not prevent, said chemical compound from reaching said first layer.
A method for limiting the usable life of an optically readable media, comprising:
A method for limiting the usable life of an optically readable media, comprising:
A method for limiting the usable life of an optically readable media, comprising:
A method for limiting the usable life of an optically readable media, comprising:
An optically readable media and packaging therefor, said media comprising a material that over time undergoes at least one of a chemical change or a physical change to render unreadable the optically readable media, said media being sealed within said packaging with a source of a chemical compound that promotes said change, said packaging comprising a getter of said chemical compound.
Dependencies are inferred from the claim text.