1. The reexamination requester shall postpone the reply;
2. After the priority examination request is approved, the claimant for invalidation shall supplement the evidence and reasons;
3. After the priority examination request is approved, the patentee modifies the claim by other means than deletion;
4. The patent reexamination or patent invalidation procedure is suspended;
5. The trial of a case depends on the review conclusions of other cases;
6. Difficult cases, and approved by the director of the Patent Reexamination Board.