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US 8,986,967 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.
Claims9
A method of making a marked paper product, the method comprising
- irradiating only a discrete portion of a paper product with at least 0.10 MRad of electron beam radiation, the electrons having an energy of at least 0.25 MeV, under conditions selected to alter the functionalization of the portion of the paper product so as to mark the paper product with a marking that is not visible to the naked eye.
Dependencies are inferred from the claim text.