586. Application to the comptroller for revocation of patent.

The comptroller1 may revoke a patent on the application of any person on, but only on, any of the grounds2 on which the court may revoke a patent3.

On the application the comptroller may order the unconditional revocation of the patent, or its revocation unless the specification is amended to his satisfaction within a specified time4. Where the comptroller refuses to grant an application so made to him, no application, otherwise than by way of appeal5 or by way of putting validity in issue in infringement proceedings, may be made to the court by the applicant in relation to the