Some countries allow both a pre-grant and a post-grant objection process, while some allow only one of the two. For instance, India allows both, but the European Patent Office allows only a post-grant objection. Under the Indian Patent Act, any person can file a notice of pre-grant objection at any time from the date of publication of the patent application until the granting of the patent. In addition, the Indian Patent Act allows any interested person to file a notice of post-grant objection within one year from the date of the patent being granted. A "person interested" is defined as one who is engaged, promoting, or researching in the same field as that of the invention.