The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2011
Filed:
Oct. 30, 2008
Applicants:
George M. Williams, Portland, OR (US);
David M. Schut, Philomath, OR (US);
Inventors:
George M. Williams, Portland, OR (US);
David M. Schut, Philomath, OR (US);
Assignee:
Voxtel, Inc., Beaverton, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 9/04 (2006.01); F21V 9/06 (2006.01); G02B 5/22 (2006.01); G02B 5/26 (2006.01); F21V 9/00 (2006.01); G02B 5/02 (2006.01); G02C 7/10 (2006.01); G02F 1/361 (2006.01); G03B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention provides, in one aspect, a procedure to use optically transparent nanocrystalline quantum dots to absorb UV light. This absorption process leads to an energy transfer to a chemically bound and chelated lanthanide ion that may emit light in either the visible spectrum (400-700 nm) or in the near infrared (700-1600 nm). This invention also provides methods for the use of these taggant materials in inks and aerosols used to disperse the taggant.