US 11,851,595 B2
Color stable red-emitting phosphors
James Edward Murphy, Niskayuna, NY (US); Anant Achyut Setlur, Niskayuna, NY (US); Florencio Garcia, Schenectady, NY (US); Robert Joseph Lyons, Burnt Hills, NY (US); Ashfaqul Islam Chowdhury, Broadview Heights, OH (US); Nagaveni Karkada, Bangalore (IN); Prasanth Kumar Nammalwar, Bangalore (IN); and William Winder Beers, Chesterland, OH (US)
Assigned to CURRENT LIGHTING SOLUTIONS, LLC, Beachwood, OH (US)
Filed by CURRENT LIGHTING SOLUTIONS, LLC, East Cleveland, OH (US)
Filed on Jul. 13, 2021, as Appl. No. 17/374,441.
Application 17/374,441 is a continuation of application No. 16/294,651, filed on Mar. 6, 2019, granted, now 11,098,246.
Application 16/294,651 is a continuation of application No. 15/402,606, filed on Jan. 10, 2017, abandoned.
Application 15/402,606 is a continuation of application No. 14/285,746, filed on May 23, 2014, granted, now 9,580,648, issued on Feb. 28, 2017.
Application 14/285,746 is a continuation of application No. PCT/US2014/027733, filed on Mar. 14, 2014.
Claims priority of provisional application 61/791,511, filed on Mar. 15, 2013.
Prior Publication US 2021/0340443 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 11/61 (2006.01); C09K 11/67 (2006.01); C09K 11/66 (2006.01); C09K 11/02 (2006.01); H01L 33/50 (2010.01); C08K 3/34 (2006.01)
CPC C09K 11/617 (2013.01) [C08K 3/34 (2013.01); C09K 11/025 (2013.01); C09K 11/616 (2013.01); H01L 33/502 (2013.01); H01L 2224/48091 (2013.01); H01L 2224/48247 (2013.01); H01L 2224/48257 (2013.01); H01L 2924/181 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A lighting apparatus comprising a semiconductor light source; and
a color stable M4+ doped phosphor of formula K2SiF6:Mn4+, wherein % intensity loss of the phosphor after exposure to light flux of at least 80 w/cm2 at a temperature of at least 50° C. for at least 8 hours is ≤4%.