Opposition under the Indian Patents Act 1970 – After the Patent Office has examined an application and found it in order forgrant of a patent, it publishes the title pf the invention, name of the inventor(s) and the applicant(s), abstract of the invention, drawings and claims in the Gazette of India.
Part III Section 2, for interested parties to oppose the grant of the patent. An application for opposition may be filed at the concerned Patent Office branch within four months of the date of the issue of the concerned gazette.
An extension of one month is possible; a request for extension has to be made within the first four months. Typed or photocopies of the specification together with photocopies of the drawings, if any, can be obtained from the Patent Office, Calcutta or the concerned branch office on payment of the prescribed fees.
One would like to oppose if the idea of the accepted application infringes upon one’s invention/existing patent, if the coverage of the proposed patent is very wide which may be detrimental to one’s research or if the idea is not novel and so on.