Patents Represented by Law Firm Connollly & Hutz
  • Iron complexes and bleaching baths containing same
    Patent number: 5009985
    Abstract: Iron(III)-complexes of compounds of the formula ##STR1## wherein R.sub.1 denotes a substituent,m denotes 1 or 2 andn denotes 0, 1 or 2are valuable and biodegradable bleaching agents for photographic elements.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: April 23, 1991
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Friedrich-Wilhelm Kunitz, Ralf Wichmann