Section 25(2) Patents Act 1970 deals with POST-GRANT OPPOSITION — opposition after grant. The time limit is:
Answer & Solution
Correct answer: A.
1. Section 25(2) Patents Act 1970: 'At any time after the grant of patent but before the expiry of a period of ONE YEAR from the date of publication of grant of a patent, any person interested may give notice of opposition to the Controller in the prescribed manner on any of the grounds mentioned in sub-section (2).'
2. Note: 'person interested' is defined in Section 2(1)(t) — includes a person engaged in / promoting research in same field as that to which the invention relates.
3. The grounds are similar to Section 25(1) — wrongful obtaining, prior publication, prior claim, etc.
4. Hence option B is correct.
_Source: Patents Act 1970 / Copyright Act 1957 / Trade Marks Act 1999 (Bare Acts, IPIndia portal + Copyright Office) — Patents Act 1970, Section 25(2)_
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