---
kind: "section"
citation: "37 C.F.R. § 1.431"
title: "37"
number: "1.431"
heading: "International application requirements."
url: "https://uscodex.org/cfr/37/1.431"
---

# §1.431. International application requirements.

- (a) An international application shall contain, as specified in the Treaty and the Regulations, a Request, a description, one or more claims, an abstract, and one or more drawings (where required). (PCT Art. 3(2) and [section 207](/cfr/37/207.md) of the Administrative Instructions.)
- (b) An international filing date will be accorded by the United States Receiving Office, at the time to receipt of the international application, provided that:
  - (1) At least one applicant ([§ 1.421](/cfr/37/1.421.md)) is a United States resident or national and the papers filed at the time of receipt of the international application so indicate ([35 U.S.C. 361(a)](/usc/35/361.md?p=a), PCT Art. 11(1)(i)).
  - (2) The international application is in the English language ([35 U.S.C. 361(c)](/usc/35/361.md?p=c), PCT Art. 11(1)(ii)).
  - (3) **The international application contains at least the following elements (PCT Art.** 11(1)(iii)):
    - (i) An indication that it is intended as an international application (PCT [Rule 4.2](/cfr/37/4.2.md));
    - (ii) The designation of at least one Contracting State of the International Patent Cooperation Union ([§ 1.432](/cfr/37/1.432.md));
    - (iii) The name of the applicant, as prescribed (note §§ [1.421](/cfr/37/1.421.md), [1.422](/cfr/37/1.422.md), and [1.424](/cfr/37/1.424.md));
    - (iv) A part which on the face of it appears to be a description; and
    - (v) **A part which on the face of it appears to be a claim.**
- (c) Payment of the international filing fee (PCT [Rule 15.2](/cfr/37/15.2.md)) and the transmittal and search fees ([§ 1.445](/cfr/37/1.445.md)) may be made in full at the time the international application papers required by [paragraph (b)](#b) of this section are deposited or within one month thereafter. The international filing, transmittal, and search fee payable is the international filing, transmittal, and search fee in effect on the receipt date of the international application. If the international filing, transmittal, and search fees are not paid within one month from the date of receipt of the international application and prior to the sending of a notice of deficiency, which imposes a late payment fee ([§ 1.445(a)(6)](/cfr/37/1.445.md?p=a-6)), the applicant will be notified and given a one-month non-extendable time limit within which to pay the deficient fees plus the late payment fee.
- (d) If the payment needed to cover the transmittal fee, the international filing fee, the search fee, and the late payment fee pursuant to [paragraph (c)](#c) of this section is not timely made in accordance with PCT [Rule 16bis.1(e)](/cfr/37/16bis.1.md?p=e), the Receiving Office will declare the international application withdrawn under PCT Article 14(3)(a).

## Notes

### Amendments

[43 FR 20466, May 11, 1978, as amended at 50 FR 9383, Mar. 7, 1985; 52 FR 20047, May 28, 1987; 58 FR 4344, Jan. 14, 1993; 63 FR 29618, June 1, 1998; 68 FR 59887, Oct. 20, 2003; 68 FR 67805, Dec. 4, 2003; 77 FR 48823, Aug. 14, 2012; 85 FR 46990, Aug. 3, 2020]

### Authority

Authority: Secs. 1.401 to 1.499 also issued under 35 U.S.C. 41 and 351 through 376.

### Source

Source: 43 FR 20466, May 11, 1978, unless otherwise noted.

### Authority

Authority: 35 U.S.C. 2(b)(2), unless otherwise noted.

### Source

Source: 24 FR 10332, Dec. 22, 1959, unless otherwise noted.

### Amendments

[43 FR 20466, May 11, 1978, as amended at 50 FR 9383, Mar. 7, 1985; 52 FR 20047, May 28, 1987; 58 FR 4344, Jan. 14, 1993; 63 FR 29618, June 1, 1998; 68 FR 59887, Oct. 20, 2003; 68 FR 67805, Dec. 4, 2003; 77 FR 48823, Aug. 14, 2012; 85 FR 46990, Aug. 3, 2020]