After seven weeks of investigation by the National Labor Relations Board, a powerful state employees union, AFSCME Council 4, has dropped its unfair labor practice action against the Connecticut Bar Association. With that, a rare attempt to unionize a state bar organization appears to be over.

“We’re pleased that it is over, and that it ended for the reasons we said it should — that nobody here had any knowledge” of unionizing activity at the CBA, said Janis C. Jerman, associate director of the CBA and a labor lawyer by training.