By judgment entered on August 1, 2003, William T. Cross was convicted by a jury of witness tampering, 18 U.S.C. § 1512(b)(1) (2006), and retaliating against a witness, 18 U.S.C. § 1513(b)(2) (2006). On appeal, this court affirmed his convictions, but vacated his sentence and remanded for resentencing. United States v. Cross, 371 F.3d 176 (4th Cir. 2004). This court affirmed the sentence imposed at resentencing. United States v. Cross, 159 FedAppx. 484 (4th Cir. 2005) (unpublished).

Seeking a second direct criminal appeal of his convictions, Cross filed a notice of appeal at the earliest on January 22, 2009, of the district court’s pre-trial April 15, 2003, order denying his motion to dismiss for lack of jurisdiction. The Government has moved to dismiss the appeal because it is untimely. Criminal defendants have ten days from the entry of the judgment or order at issue to file a notice of appeal. See Fed. R.App. P. 4(b).

While Cross’s appeal is clearly untimely, appeal periods in criminal cases are not jurisdictional; rather, they are “claim-processing rules” adopted by the Supreme *287 Court that do not affect this court’s subject-matter jurisdiction. See Bowles v. Russell, 551 U.S. 205, 208-13, 127 S.Ct. 2360, 168 L.Ed.2d 96 (2007); United States v. Frias, 521 F.3d 229, 233 (2d Cir. 2008); United States v. Mitchell, 518 F.3d 740, 744 (10th Cir. 2008). Despite the fact that the time limitations imposed by Rule 4(b) are not jurisdictional, they “must be enforced by th[e] court when properly invoked by the government.” Mitchell, 518 F.3d at 744.

Accordingly, we grant the Government’s motion to dismiss the appeal as untimely filed. We deny Cross’s motions for appointment of counsel and to dismiss for lack of subject matter jurisdiction. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

DISMISSED.