41.4 Timeliness.
- (a) Extensions of time. Extensions of time will be granted only on a showing of good cause except as otherwise provided by rule.

- (b) Late filings. (1) A late filing that results in either an application becoming abandoned or a reexamination prosecution becoming terminated under §§ 1.550(d) or 1.957(b) of this title or limited under § 1.957(c) of this title may be revived as set forth in § 1.137 of this title.
- (2) A late filing that does not result in either an application becoming abandoned or a reexamination prosecution becoming terminated under §§ 1.550(d) or 1.957(b) of this title or limited under § 1.957(c) of this title will be excused upon a showing of excusable neglect or a Board determination that consideration on the merits would be in the interest of justice.

- (c) Scope. This section governs all proceedings before the Board, but does not apply to filings related to Board proceedings before or after the Board has jurisdiction, such as:

[Added, 69 FR 49959, Aug. 12, 2004, effective Sept. 13, 2004; para. (b) revised, 72 FR 18892, Apr. 16, 2007, effective May 16, 2007]