MPEP 403

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← MPEP 402 ↑ MPEP 400 MPEP 404 →


403 Correspondence — With Whom Held[edit | edit source]

37 CFR 1.33. Correspondence respecting patent applications, reexamination proceedings, and other proceedings.

(a) Correspondence address and daytime telephone number. When filing an application, a correspondence address must be set forth in either an application data sheet (§ 1.76), or elsewhere, in a clearly identifiable manner, in any paper submitted with an application filing. If no correspondence address is specified, the Office may treat the mailing address of the first named inventor (if provided, see §§ 1.76(b)(1) and 1.63(c)(2)) as the correspondence address. The Office will direct all notices, official letters, and other communications relating to the application to the correspondence address. The Office will not engage in double correspondence with an applicant and a patent practitioner, or with more than one patent practitioner except as deemed necessary by the Director. If more than one correspondence address is specified in a single document, the Office will select one of the specified addresses for use as the correspondence address and, if given, will select the address associated with a Customer Number over a typed correspondence address. For the party to whom correspondence is to be addressed, a daytime telephone number should be supplied in a clearly identifiable manner and may be changed by any party who may change the correspondence address. The correspondence address may be changed as follows:

(1) Prior to filing of § 1.63 oath or declaration by any of the inventors. If a § 1.63 oath or declaration has not been filed by any of the inventors, the correspondence address may be changed by the party who filed the application. If the application was filed by a patent practitioner, any other patent practitioner named in the transmittal papers may also change the correspondence address. Thus, the inventor(s), any patent practitioner named in the transmittal papers accompanying the original application, or a party that will be the assignee who filed the application, may change the correspondence address in that application under this paragraph.

(2) Where a § 1.63 oath or declaration has been filed by any of the inventors. If a § 1.63 oath or declaration has been filed, or is filed concurrent with the filing of an application, by any of the inventors, the correspondence address may be changed by the parties set forth in paragraph (b) of this section, except for paragraph (b)(2).

(b) Amendments and other papers. Amendments and other papers, except for written assertions pursuant to § 1.27(c)(2)(ii) of this part, filed in the application must be signed by:

(1) A patent practitioner of record appointed in compliance with § 1.32(b);

(2) A patent practitioner not of record who acts in a representative capacity under the provisions of § 1.34;

(3) An assignee as provided for under § 3.71(b) of this chapter; or

(4) All of the applicants (§ 1.41(b)) for patent, unless there is an assignee of the entire interest and such assignee has taken action in the application in accordance with § 3.71 of this chapter.

(c) All notices, official letters, and other communications for the patent owner or owners in a reexamination proceeding will be directed to the attorney or agent of record (see § 1.32(b)) in the patent file at the address listed on the register of patent attorneys and agents maintained pursuant to §§ 11.5 and 11.11 of this subchapter, or if no attorney or agent is of record, to the patent owner or owners at the address or addresses of record. Amendments and other papers filed in a reexamination proceeding on behalf of the patent owner must be signed by the patent owner, or if there is more than one owner by all the owners, or by an attorney or agent of record in the patent file, or by a registered attorney or agent not of record who acts in a representative capacity under the provisions of § 1.34. Double correspondence with the patent owner or owners and the patent owner’s attorney or agent, or with more than one attorney or agent, will not be undertaken. If more than one attorney or agent is of record and a correspondence address has not been specified, correspondence will be held with the last attorney or agent made of record.

(d) A “correspondence address” or change thereto may be filed with the Patent and Trademark Office during the enforceable life of the patent. The “correspondence address” will be used in any correspondence relating to maintenance fees unless a separate “fee address” has been specified. See § 1.363 for “fee address” used solely for maintenance fee purposes.

(e) A change of address filed in a patent application or patent does not change the address for a patent practitioner in the roster of patent attorneys and agents. See § 11.11 of this title.


37 CFR 1.33(a) provides for an applicant to supply an address to receive correspondence from the U.S. Patent and Trademark Office so that the Office may direct mail to any address of applicant’s selection, such as a corporate patent department, a firm of attorneys or agents, or an individual attorney, agent, or other person.

37 CFR 1.33(a) provides that in a patent application the applicant must specify a correspondence address to which the Office will send notices, letters and other communications relating to the application. The correspondence address must appear either in an application data sheet (37 CFR 1.76) or in a clearly identifiable manner elsewhere in any papers submitted with an application filing. Where more than one correspondence address is specified, the Office will select one of the correspondence addresses for use as the correspondence address. This is intended to cover, for example, the situation where an application is submitted with multiple addresses, such as one correspondence address being given in the application transmittal letter, and a different one in an accompanying 37 CFR 1.63 oath or declaration, or other similar situations.

The Office will select which of the multiple correspondence addresses to use according to the following order:

(A) application data sheet (ADS);

(B) application transmittal;

(C) oath or declaration (unless power of attorney is more current); and

(D) power of attorney. If more than one correspondence address is specified in a single document, the Office will select the address associated with a Customer Number over a typed correspondence address.

37 CFR 1.33(a) requests the submission of a daytime telephone number of the party to whom correspondence is to be addressed.

37 CFR 1.33(a)(1) provides that any party filing the application and setting forth a correspondence address could later change the correspondence address provided that a 37 CFR 1.63 oath/declaration by any of the inventors has not been submitted. If one joint inventor filed an application, the person who may change the correspondence address would include only the one inventor who filed the application, even if another inventor was identified on the application transmittal letter. If two of three inventors filed the application, the two inventors filing the application would be needed to change the correspondence address. Additionally, any registered practitioner named in the application transmittal letter, or a person who has the authority to act on behalf of the party that will be the assignee (if the application was filed by the party that will be the assignee), could change the correspondence address.

A registered practitioner named in a letterhead would not be sufficient, but rather a clear identification of the individual as being a representative would be required. A company (to whom the invention has been assigned, or to whom there is an obligation to assign the invention) who files an application, is permitted to designate the correspondence address, and to change the correspondence address, until such time as a (first) 37 CFR 1.63 oath/declaration is filed. The mere filing of a 37 CFR 1.63 oath/ declaration that does not include a correspondence address does not affect any correspondence address previously established on the filing of the application, or changed per 37 CFR 1.63(a)(1), even if the application was filed by a company that is only a partial assignee. The expression “party that will be the assignee,” rather than assignee, is used in that until a declaration is submitted, inventors have only been identified, and any attempted assignment, or partial assignment, cannot operate for Office purposes until the declaration is supplied. Hence, if the application transmittal letter indicates that the application is being filed on behalf of XYZ company, with an assignment to be filed later, XYZ company would be allowed to change the correspondence address without resort to 37 CFR 3.73(b) until an executed oath or declaration is filed, and with resort to 37 CFR 3.73(b) after the oath or declaration is filed.

Where a correspondence address was set forth or changed pursuant to 37 CFR 1.33(a)(1) (prior to the filing of a 37 CFR 1.63 oath or declaration), that correspondence address remains in effect upon filing of a 37 CFR 1.63 declaration and can then only be changed pursuant to 37 CFR 1.33(a)(2).

37 CFR 1.33 states that when an attorney or agent has been duly appointed to prosecute an application, correspondence will be held with the attorney or agent unless some other correspondence address has been given. If an attorney or agent of record assigns a correspondence address which is different than an address where the attorney or agent normally receives mail, the attorney or agent is reminded that 37 CFR 10.57 requires the attorney or agent to keep information obtained by attorney/agent – client relationship in confidence. Double correspondence with an applicant and his or her attorney, or with two representatives, will not be undertaken. See MPEP § 403.01, § 403.02, and § 714.01(d).

In a joint application with no attorney or agent, the applicant whose name first appears in the papers receives the correspondence, unless other instructions are given. All applicants must sign the replies. See MPEP § 714.01(a). If the assignee of the entire interest of the applicant is prosecuting the application (MPEP § 402.07), the assignee may specify a correspondence address.

37 CFR 1.33(c) relates to which address communications for the patent owner will be sent in reexamination proceedings. See also MPEP § 2224.

Powers of attorney to firms are not recognized by the U.S. Patent and Trademark Office. See MPEP § 402. However, the firm’s address may be used for the correspondence address.

Patent practitioners are reminded that the attorney and agent roster must be updated separately from and in addition to any change of address filed in individual patent applications.

I. CUSTOMER NUMBER PRACTICE[edit | edit source]

A Customer Number (previously a "Payor Number") may be used to:

(A) designate the correspondence address of a patent application or patent such that the correspondence address for the patent application or patent would be the address associated with the Customer Number (37 CFR 1.32(a)(5)(i));

(B) designate the fee address (37 CFR 1.363) of a patent such that the fee address for the patent would be the address associated with the Customer Number (37 CFR 1.32(a)(5)(ii)); and

(C) submit a list of practitioners such that those practitioners associated with the Customer Number would have power of attorney (37 CFR 1.32(a)(5)(iii)).

Thus, a Customer Number may be used to designate the address associated with the Customer Number as the correspondence address of an application (or patent) or the fee address of a patent, and may also be used to submit a power of attorney in the applica tion (or patent) to the registered practitioners associated with the Customer Number.

Applicant may use either the same or different customer number(s) for the correspondence address, the fee address and/or a list of practitioners. The customer number associated with the correspondence address is the Customer Number used to obtain access to the Patent Application Information Retrieval (PAIR) system at http://pair.uspto.gov. See MPEP § 1730 for additional information regarding PAIR.

With Customer Number practice, a patentee is also able to designate a “fee address” for the receipt of maintenance fee correspondence, and a different address for the receipt of all other correspondence. The designation of a “fee address” by reference to a Customer Number will not affect or be affected by the designation of a correspondence address by reference to another Customer Number, in that the Office will send maintenance fee correspondence to the address associated with the Customer Number designated as the “fee address” and will send all other correspondence to the address associated with the Customer Number designated as the correspondence address.

The association of a list of practitioners with a Customer Number will permit an applicant to appoint all of the practitioners associated with the Customer Number merely by reference to the Customer Number in the Power of Attorney (i.e., without individually listing the practitioners in the Power of Attorney). The addition and/or deletion of a practitioner from the list of practitioners associated with a Customer Number by submitting a corresponding “Request for Customer Number Data Change” (PTO/SB/124) will result in the addition or deletion of such practitioner from the list of persons authorized to represent any applicant or assignee of the entire interest of the applicant who appointed all of the practitioners associated with such Customer Number. This will avoid the necessity for the filing of additional papers in each patent application affected by a change in the practitioners of the law firm prosecuting the application. The appointment of practitioners associated with a Customer Number is optional, in that any applicant may continue to individually name those practitioners to represent the applicant in a patent application, so long as fewer than ten patent practitioners are named. See 37 CFR 1.32(c)(3).

The Customer Number practice does not affect the prohibition against, and does not amount to, an appointment of a law firm (rather than specified practitioners). The Office prohibits an appointment of a specified law firm because the Office cannot ascertain from its records whether a particular practitioner submitting a paper to the Office is associated with the law firm specified in an appointment. The Office will permit an appointment of all of the practitioners associated with a specified Customer Number because the Office can ascertain from its records for the specified Customer Number whether a particular practitioner is associated with that Customer Number.

As the Office will not recognize more than one correspondence address (37 CFR 1.33(a)), any inconsistencies between the correspondence address resulting from a Customer Number being provided in an application for the correspondence address and any other correspondence address provided in that application will generally be resolved in favor of the address of the Customer Number. Due to the prohibition against dual correspondence in an application (37 CFR 1.33(a)), an applicant will be permitted to provide only a single number at a time as the Customer Number for the correspondence address.

Where an applicant appoints all of the practitioners associated with a Customer Number as well as a list of individually named practitioners, such action would be treated as only an appointment of all of the practitioners associated with a Customer Number due to the potential for confusion and data entry errors in entering registration numbers from plural sources. Furthermore, Office computer systems do not allow for entry of both a power of attorney to a list of practitioners associated with a Customer Number and a list of practitioners.

Although Customer Numbers are designed to designate both a correspondence address and to associate one or more patent practitioners with an application, one Customer Number may be used for the correspondence address, and another Customer Number may be used for the power of attorney.

II.PATENT APPLICATION FILED WITHOUT CORRESPONDENCE ADDRESS[edit | edit source]

In accordance with the provisions of 35 U.S.C. 111(a) and 37 CFR 1.53, a filing date is granted to a nonprovisional application for patent filed in the U.S. Patent and Trademark Office, if it includes at least a specification containing a description pursuant to 37 CFR 1.71 and at least one claim pursuant to 37 CFR 1.75, and any drawing referred to in the specification or required by 37 CFR 1.81(a). If a nonprovisional application which has been accorded a filing date does not include the appropriate basic filing fee, search fee, examination fee, or oath or declaration, the applicant will be so notified and given a period of time within which to file the missing parts to complete the application and to pay the surcharge as set forth in 37 CFR 1.16(f) in order to prevent abandonment of the application. If a provisional application which has been accorded a filing date does not include the appropriate filing fee, or the cover sheet, the applicant will be so notified and given a period of time within which to file the missing parts to complete the application and to pay the surcharge as set forth in 37 CFR 1.16(g) in order to prevent abandonment of the application.

In order for the Office to so notify the applicant, a correspondence address must also be provided by the applicant. The address may be different from the post office address of the applicant. For example, the address of the applicant’s registered attorney or agent may be used as the correspondence address. If the applicant fails to provide the Office with a correspondence address, the Office will be unable to provide the applicant with notification to complete the application and to pay the surcharge as set forth in 37 CFR 1.16(f) for nonprovisional applications and 37 CFR 1.16(g) for provisional applications. In such a case, the applicant will be considered to have constructive notice as of the filing date that the application must be completed and the applicant will have 2 months from the filing date in which to do so before abandonment occurs.

The periods of time within which the applicant must complete the application may be extended under the provisions of 37 CFR 1.136. Applications which are not completed in a timely manner will be abandoned.

403.01 Correspondence Held With Associate Attorney[edit | edit source]

Where the attorneys bear relation of principal attorney and associate attorney, the correspondence will be had with the associate attorney unless the principal attorney directs otherwise. Ex parte Eggan, 1911 C.D. 213, 172 O.G. 1091 (Comm’r Pat. 1911). The associate attorney may specify or change the correspondence address to which communications about the application are to be directed. Associate powers of attorney are not accepted after June 25, 2004, but any associate power of attorney filed before June 25, 2004 will continue to have effect.

403.02 Two Patent Practitioners for Same Application[edit | edit source]

If the applicant simultaneously appoints two principal patent practitioners, he or she should indicate with whom correspondence is to be conducted. If one is a local Washington metropolitan area patent practitioner and the applicant fails to indicate either patent practitioner, correspondence will be conducted with the local patent practitioner.

If, after one patent practitioner is appointed, a second patent practitioner is later appointed without revocation of the power of the first patent practitioner, the correspondence address of the second patent practitioner is entered into the application file record, so that the Office letters are to be sent to him or her.

← MPEP 402 ↑ MPEP 400 MPEP 404 →