Patents Act, 1970
59. Supplementary provisions as to amendment of
application or specification
(1) No amendment of an application for a patent or a complete
specification shall be made except by way of disclaimer, correction or
explanation, and no amendment thereof shall be allowed, except for the purpose
of correcting an obvious mistake, and no amendment of a complete specification
shall be allowed the effect of which would be that the specification as amended
would claim or describe matter not in substance disclosed in the specification
before the amendment, or that any claim of the specification as amended would
not fall wholly within the scope of a claim of the specification before the
amendment.
(2) Where after the date of advertisement of acceptance of a
complete specification, any amendment of the specification is allowed by the
Controller or by the High Court,
(a) the amendment shall for all purposes be
deemed to form part of the specification;
(b) the fact that the specification has been
amended shall be advertised in the Official Gazette; and
(c) the right of the applicant or patentee to
make amendment shall not be called in question except on the ground of fraud.
(3) In construing the specification as amended, reference may be
made to the specification as originally accepted.