The Convention does not explicitly mention overly broad claims. However, objections to such claims may arise for various reasons.
Sometimes an objection of lack of novelty arises, for example if the claim is formulated in such broad terms that it also covers known subject-matter from other technical fields. Broad claims may also cover embodiments for which a purported effect has not been achieved. On raising an objection of lack of inventive step in such cases, see G‑VII, 5.2.