Patents Assigned to Trinapco Inc.
  • Triazatrinaphthyrins and the use thereof
    Patent number: 6407089
    Abstract: A novel class of macrocycles, termed triazatrinaphthyrins, is disclosed having general Formula I: or a solvate, hydrate, ester or salt thereof; wherein R1, R2, R3, Ra, Ra′, Ra″, Rb, Rb′, Rb″, Rc, Rc′, Rc″, Rd, Rd′ and Rd″ are defined in the specification. The macrocycles are useful in the extraction of transition metals, in particular in the extraction of lanthanides.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: June 18, 2002
    Assignee: Trinapco Inc.
    Inventor: Martin R. Johnson