37 CFR §1.103

1. (a)Suspension for cause. On request of the applicant, the Office may grant a suspension of action by the Office under this paragraph for good and sufficient cause. The Office will not suspend action if a reply by applicant to an Office action is outstanding. Any petition for suspension of action under this paragraph must specify a period of suspension not exceeding six months. Any petition for suspension of action under this paragraph must also include:
   1. (1)A showing of good and sufficient cause for suspension of action; and
   2. (2)The fee set forth in § 1.17(g), unless such cause is the fault of the Office.
2. (b)Limited suspension of action in a continued prosecution application (CPA) filed under § 1.53(d). On request of the applicant, the Office may grant a suspension of action by the Office under this paragraph in a continued prosecution application filed under § 1.53(d) for a period not exceeding three months. Any request for suspension of action under this paragraph must be filed with the request for an application filed under § 1.53(d), specify the period of suspension, and include the processing fee set forth in § 1.17(i).
3. (c)Limited suspension of action after a request for continued examination (RCE) under § 1.114. On request of the applicant, the Office may grant a suspension of action by the Office under this paragraph after the filing of a request for continued examination in compliance with § 1.114 for a period not exceeding three months. Any request for suspension of action under this paragraph must be filed with the request for continued examination under § 1.114, specify the period of suspension, and include the processing fee set forth in § 1.17(i).
4. (d)Deferral of examination. On request of the applicant, the Office may grant a deferral of examination under the conditions specified in this paragraph for a period not extending beyond three years from the earliest filing date for which a benefit is claimed under title 35, United States Code. A request for deferral of examination under this paragraph must include the publication fee set forth in § 1.18(d) and the processing fee set forth in § 1.17(i). A request for deferral of examination under this paragraph will not be granted unless:
   1. (1)The application is an original utility or plant application filed under § 1.53(b) or resulting from entry of an international application into the national stage after compliance with § 1.495;
   2. (2)The applicant has not filed a nonpublication request under § 1.213(a), or has filed a request under § 1.213(b) to rescind a previously filed nonpublication request;
   3. (3)The application is in condition for publication as provided in § 1.211(c); and
   4. (4)The Office has not issued either an Office action under 35 U.S.C. 132 or a notice of allowance under 35 U.S.C. 151.
5. (e)Notice of suspension on initiative of the Office. The Office will notify applicant if the Office suspends action by the Office on an application on its own initiative.
6. (f)Suspension of action for public safety or defense. The Office may suspend action by the Office by order of the Director if the following conditions are met:
   1. (1)The application is owned by the United States;
   2. (2)Publication of the invention may be detrimental to the public safety or defense; and
   3. (3)The appropriate department or agency requests such suspension.