Disclaimers before issue.
Section 13
SEC. 13. Disclaimers before issue.—The Director shall require unregistrable matter to be disclaimed, but such disclaimer shall not prejudice or affect the applicant's or owner's rights then existing or thereafter arising in the disclaimed matter, nor shall such disclaimer prejudice or affect the applicant's or owner's rights of registration on another application of later date if the disclaimed matter has become distinctive of the applicant's or owner's goods, business or services.