In general
The owner of a basic application pending before the United States Patent and Trademark Office, or the owner of a basic registration granted by the United States Patent and Trademark Office may file an international application by submitting to the United States Patent and Trademark Office a written application in such form, together with such fees, as may be prescribed by the Director.
Qualified owners
A qualified owner, under subsection (a), shall—
be a national of the United States;
be domiciled in the United States; or
have a real and effective industrial or commercial establishment in the United States.
July 5, 1946, ch. 540 Pub. L. 107–273, div. C, title III, § 13402116 Stat. 1915 (, title XII, § 61, as added , , .)