07.01.19
US Patent No. 10,300,001 B2 (Talia S. Gershon, Ning Li, Devendra K. Sadana, Teodor K. Todorov); International Business Machines Corporation has patented a method that entails selecting a combination of multiple organic materials to incorporate into a sunscreen composition, wherein selection is based, at least in part on: a desired absorption spectrum of the sunscreen composition; the absorption spectrum of each of the multiple organic materials, and; a particle size limitation for each of the multiple organic materials. The multiple organic materials comprise N,N′-Bis(naphthalen-1-yl)-N,N′-bis(phenyl)-2,2′-dimethylbenzidine. The combination of organic materials is incorporated into the sunscreen composition to generate the desired absorption spectrum.