Honeywell International Inc., a company involved in business activities of commercial and consumer products, engineering services and aerospace systems sector, has been recently granted a patent for invention titled “REFRACTIVE INDEX MATCHED PHOSPHORS AND SUBSTRATES FOR SECURITY APPLICATIONS”.
The patent has been issued as granted patent number 305821 filed as application number 5246/DELNP/2012 having scope (abstract) of invention as:
“Phosphor compositions are provided that can be incorporated into or onto plastic substrates as covert security features. The plastic substrates can be transparent and the phosphor compositions have a refractive index that effectively matches the refractive index of the plastic substrate to maintain the transparency. The phosphor compositions have absorption in the infrared thus enabling excitation and detection of the compositions with an infrared emitting source.”
The primary independent claim (claim 1) of this patent states:
“A plastic substrate comprising; a transparent plastic material having a refractive index; and a phosphor composition incorporated into the plastic material., the phosphor composition comprising at least one active ion and a fluoride containing crystalline host lattice material; wherein the phosphor composition has absorption in the infrared, and has a refractive index that effectively ‘matches the refractive index, of the plastic material.”
The patent has been granted under International Patent Classification (IPC) B42D 15/00, C09K 11/08, which covers inventions related to:
B42D 15/00 – Printed matter of special format or style not otherwise provided for
C09K 11/08 – Luminescent, e.g. electroluminescent, chemiluminescent, materials containing inorganic luminescent materials
This patent can be opposed under post-grant patent opposition within 12 months of the date of grant of this patent.
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