A patent application becomes abandoned for failure to file a complete and proper reply as the condition of the application may require within the time period provided under 37 CFR § 1.134 and § 1.136 unless an Office action indicates otherwise.
Abandonment may be either of the invention or of an application. An abandoned application, in accordance with 37 CFR §§ 1.135 and 1.138, is one which is removed from the Office docket of pending applications.
— see MPEP 711 for more
— see express abandonment