Photoprotective Technologies
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PPT has 4 issued patents relating to melanin and Ocular Lens Pigment and their various formulations that make possible their incorporation into optical lenses and films. 

Patents and Publications

  • 2013/0078,205 2013 Compound, Composition, and Method for Protecting Skin from High Energy Visible Light  
  • 8,133,414 2012 Light filters using yellow melanin and melanin-like oligomers and photochromic dyes  
  • 8,048,343 2011 Light filters using yellow melanin and melanin-like oligomers and photochromic dyes  
  • 2010/0123,105 2010 Light filters using yellow melanin and melanin-like oligomers and photochromic dyes  
  • 2006/0282,066 2006 Light filters using yellow melanin and melanin-like oligomers and photochromic dyes  
  • 2005/0041,299 2005 Light filters using the oxidative polymerization product of 3-hydroxykynurenine (3-OHKyn)  
  • 5,187,207 1993 Melanin hydrophilic contact lenses  
  • 5,116,884 1992 Melanin hydrophilic contact lenses  
  • 5,112,883 1992 Medium incorporating melanin as an absorbing pigment against electromagnetic radiation  
  • 5,047,447 1991 Medium incorporating melanin as an absorbing pigment for protection against electromagnetic radiation  
  • 5,036,115 1991 Optical lens system incorporating melanin as an absorbing pigment for protection against electromagnetic radiation  
  • 4,698,374 1987 Optical lens system incorporating melanin as an absorbing pigment for protection against electromagnetic radiation  
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