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US 10,380,388 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.
Claims11
A marked paper product comprising:
- a sheet comprising a cellulosic or lignocellulosic fibrous paper material comprising fibers derived from a non-wood fiber source or synthetic fibers,
- wherein an irradiated discrete, predefined portion of a surface of the sheet contains functional groups or a number thereof not present in a non-irradiated portion of the same surface of the sheet, and wherein the functional groups not present in the non-irradiated portion of the sheet are formed by irradiation of the discrete, predefined portion with accelerated particles.
Dependencies are inferred from the claim text.