Multiple inventions in one application.
Section 17
SEC. 17. Multiple inventions in one application.—If several independent inventions which are not so closely related as to be proper in one application are claimed, the Director may require the application to be restricted to a single invention in the same manner as notifications of defects in the application. A later application filed for an invention divided out shall be considered as having been filed on the same day as the first application provided the later application is filed within four months after the requirements to divide becomes final, or within such additional time, not exceeding four months, as may be granted.