Radiation imagery chemistry: process – composition – or product th – Imaged product – Antifraud or antitampering
Reexamination Certificate
2011-03-01
2011-03-01
RoDee, Christopher (Department: 1721)
Radiation imagery chemistry: process, composition, or product th
Imaged product
Antifraud or antitampering
C283S904000, C382S321000, C380S054000, C430S108600, C430S108100, C430S115000, C523S153000, C523S160000
Reexamination Certificate
active
07897307
ABSTRACT:
Disclosed is a birefringent marking material comprising a vehicle for the marking material and birefringent nanoparticles having an average particle size of less than about 700 nm. The birefringent marking material, such as an ink or a toner, can be used to provide a security marking on or in an item, thereby enabling authentication of the item containing the image formed using the birefringent marking material.
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Kohji Yoshinaga, Ch. 12.1, Surface Modification of Inorganic Particles, in Surfactant Science Series published 2000 by CRC Press, p. 626-627. Obtained from Google Books website: http://books.google.com/books?id=lurWPtFnTRsC&pg=PA626&lpg=PA626&dq=Surface+Modification+of+Inorganic+particles+Yoshinaga&source=bl&ots=m-Odxsr6DX&sig=XEolzoh9DUeb0ZyQwaQ.
Allen C. Geoffrey
Iftime Gabriel
Kazmaier Peter M.
Smith Paul F.
Oliff & Berridg,e PLC
Rodee Christopher
Vajda Peter L
Xerox Corporation
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