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US 9,342,715 B2Granted
Marking paper products
AssigneeXyleco, Inc.
InventorMarshall Medoff
Life of this patent
Estimating the term…
Abstract
Methods of marking paper products and marked paper products are provided. Some methods include irradiating the paper product to alter the functionalization of the paper.
Claims13
A marked paper product comprising:
- a sheet comprising a cellulosic or lignocellulosic fibrous paper material, wherein the cellulosic or lignocellulosic fibrous material of an irradiated discrete, predefined portion of the sheet contains functional groups or a number thereof not present in the sheet prior to irradiation or in a non-irradiated portion of the cellulosic or lignocellulosic fibrous paper material, wherein the irradiated discrete portion of the sheet has been irradiated with a dose of ionizing radiation of at least 0.10 MRad sufficient to functionalize the cellulose or lignocellulose with said functional groups.
Dependencies are inferred from the claim text.