(a)
The United States Patent and Trademark Office will act as a Designated Office or Elected Office for international applications in which the United States of America has been designated or elected as a State in which patent protection is desired.
(b)
The United States Patent and Trademark Office, when acting as a Designated Office or Elected Office during international processing will be identified by the full title “United States Designated Office” or by the abbreviation “DO/US” or by the full title “United States Elected Office” or by the abbreviation “EO/US”.
(c)
The major functions of the United States Designated Office or Elected Office in respect to international applications in which the United States of America has been designated or elected, include:
(1)
Receiving various notifications throughout the international stage and
(2)
Accepting for national stage examination international applications which satisfy the requirements of 35 U.S.C. 371.
Code of Federal Regulations
[52 FR 20047, May 28, 1987]