Patents Examined by Peter T. Mauro
  • Process for purifying silver nitrate solution using activated alumina
    Patent number: 5171559
    Abstract: A process for removing heavy metals from a silver nitrate solution is disclosed. The process comprises the step of bringing said silver nitrate solution into contact with activated alumina having a surface acidity of at least 8 and an average pore diameter of not more than 50 .ANG..
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: December 15, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kikuo Ando