To gain further insight on entities participating in the field, the second patent that is been cited most by others was studied for its relationships as shown in the “second top cited patent” figure. The team noted that this patent has been cited heavily by others, in part because it is key to the field and also in part because it is quite old, having been issued in 1978. The patent itself references nine other patents which is a reasonable number for a new chemical entity. The team concludes that over the years this has been an active area of business development. From their participation in the citation map KCC and Sumitomo are certainly potential competitors or partners for the investigating company. This large amount of art also raises potential prior art bars. The question this graphic raised for the project team was “in the tree branches that are not populated by their own company, what are the opportunities?”