621. Notification of the parties.

621.     Notification of the parties.

The comptroller1 must notify the applicant for, or proprietor of, the patent which is the subject matter of the case that proceedings have started2. In addition, the comptroller may notify any persons who appear to him to be likely to have an interest in the case that proceedings have started3. However, where such a person is the claimant4, or has indicated in writing to the comptroller that he supports the claimant's case, the comptroller has no duty to notify him5. The comptroller must send the