A patent may be revoked on any of the following grounds1:
(1) that there is no patentable invention2, that is say:
(a) that the invention was not new3;
(b) that the invention did not involve an inventive step4;
(c) that the invention was incapable of industrial application5;
(d) that it was not an invention as defined by the Patents Act 19776;
(e) that it was contrary to public policy or morality7;
(2) that the patent specification is insufficient8;
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