A former member of 1960s musical group The Duprees has hit a sour note in his attempt to wrest control of the group’s name.

Michael Kelly, who sang with the group from 1960-61 and 1965-78, claimed a founding member, Michael Arnone, fraudulently obtained a trademark for the Duprees’ name in 1981. Kelly sued Arnone’s estate, seeking to invalidate its trademark.