That\'s the standard problem with these patents. Everyone has one, the first I saw actually included in a photographic sensor was back in 2008 (Epson/Seiki).
Sony\'s first patents regarding this was in 2009. Panasonic, Samsung, \'omni, STI and Aptina followed suit shortly after.
None of them include material of choice, and all have stated longevity problems as the main source for not going into beta right now.
