(a) A preliminary amendment is an amendment that is received in the Office (§ 1.6) on or before the mail date of the first Office action under § 1.104.
(1) A preliminary amendment will be entered unless disapproved by the Commissioner. A preliminary amendment may be disapproved if the preliminary amendment unduly interferes with the preparation of a first Office action in an application. Factors that will be considered in disapproving a preliminary amendment include:
(i) The state of preparation of a first Office action as of the date of receipt (§ 1.6) of the preliminary amendment by the Office; and
(ii) The nature of any changes to the specification or claims that would result from entry of the preliminary amendment.
(2) A preliminary amendment will not be disapproved if it is filed no later than:
(i) Three months from the filing date of an application under § 1.53(b);
(ii) The filing date of a continued prosecution application under § 1.53(d); or
(iii) Three months from the date the national stage is entered as set forth in § 1.491 in an international application.
(c) The time periods specified in paragraph (b)(2) of this section are not extendable.
[46 FR 29183, May 29, 1981; removed and reserved, 62 FR 53131, Oct. 10, 1997, effective Dec. 1, 1997; added, 65 FR 54604, Sept. 8, 2000, effective Nov. 7, 2000]