I have searched patents, Fred. I have not gotten to RDs or Defensive Publications which are rather harder to access and search. It really does not matter as these fluorescent compounds were complexes of things such as Europium and Yttrium or something like that. I had the information at one time, but I did not want to do any work on it due to the cost.

BTW, good seeing you yesterday Fred. Again, sorry I forgot to call you or E-mail you.