Under what circumstances can I submit a divisional application?

When an application for a patent includes two or more inventions that do not belong to the general inventive concept (that is, there is a single defect), the applicant may apply for division on his own initiative or according to the examination opinions of the examiner. For a patent application, (1) if the patent application is granted a patent right, the deadline for filing a divisional application is within two months from the date when the Patent Office issues a notice of granting a patent right to the patent application. If the patent application itself is a divisional application, the deadline for submitting the divisional application is within two months from the date when the Patent Office issues the notice of granting the patent right against the original parent case of the patent application. However, if the examiner points out the problem of singleness when reviewing the divisional application, the filing period of the divisional application for the divisional application is within two months from the date when the Patent Office issues the notice of granting the patent right for the divisional application (instead of the original case of the divisional application). (2) If the patent application is rejected, the applicant may file a divisional application within three months after receiving the rejection decision; During the review period after the request for review is made, or during the administrative proceedings against the review decision, you may apply for a chamber. (3) Where the patent application has been withdrawn, or is deemed to have been withdrawn without restoring its rights, a divisional application cannot be filed. It should be noted that it is not only a question that can be divided. In practice, divisional applications are often used to file more appropriate claims for a patent application.