This case discusses the disputes are “capable of repetition, yet evading review” exception to the rule normally requiring dismissal of moot cases. To fall within the exception, the action or appeal must be of inherently limited duration and there is a reasonable expectation that the appellant will be subjected to the same type of order in the future. This case finds both conditions satisfied by a preliminary injunction against an employer for unfair labor practices pending administrative proceedings before the NLRB and so considers the merits of the employer’s appeal of the preliminary injunction even though the NLRB had already entered its final decision in the case, mooting the preliminary injunction.