585. Application to the court for revocation of patent.

The court1 may revoke a patent on the application of any person2 on, but only on, any of the following grounds3:


    (1)     that the invention is not a patentable invention4;


    (2)     that the patent was granted to a person who was not entitled5 to be granted that patent6;


    (3)     that the specification7 does not disclose the invention clearly and completely enough for it to be performed by a person skilled in the art8;


    (4)     that the matter disclosed in the specification extends beyond that disclosed in the application for the patent, as filed9, or, if the patent was granted