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:
Sep. 04, 2018
Filed:
Apr. 27, 2010
Applicants:
Arunava Dutta, Winchester, MA (US);
Paul Salvi, Versailles, KY (US);
Carissa Mercer, Shadyside, OH (US);
Inventors:
Arunava Dutta, Winchester, MA (US);
Paul Salvi, Versailles, KY (US);
Carissa Mercer, Shadyside, OH (US);
Assignee:
LEDVANCE LLC, Wilmington, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 61/44 (2006.01); C09K 11/81 (2006.01); C09K 11/78 (2006.01); C09K 11/77 (2006.01);
U.S. Cl.
CPC ...
C09K 11/7739 (2013.01); C09K 11/778 (2013.01); C09K 11/7729 (2013.01); C09K 11/7734 (2013.01); C09K 11/7774 (2013.01); C09K 11/7777 (2013.01); H01J 61/44 (2013.01);
Abstract
A phosphor blend is described wherein the blend consists of a red-emitting rare earth phosphor, a green-emitting rare earth phosphor, and a blue-emitting rare earth phosphor wherein the 50% size of the phosphors is between about 12 to 15 μm. The phosphor blend is incorporated into a fluorescent lamp having an increased efficacy. A dual layer coating may be used to provide an additional increase in efficacy.