12/22/2011 06:41 EST | Updated 02/21/2012 05:12 EST

Barry Bonds formally files appeal of obstruction of justice conviction

SAN FRANCISCO - Barry Bonds is officially appealing his felony obstruction conviction.

His lawyers paid US$455 and filed a one-sentence notice to the federal trial court late Wednesday, saying that Bonds was asking the 9th U.S. Circuit Court of Appeal to toss out his conviction. The case will be randomly assigned to a three-judge panel later.

Bonds was sentenced Friday to 30 days of house arrest, two-years of probation and a $4,000 fine. But U.S. District Judge Susan Illston delayed imposition until the appeal is resolved.

Bonds appellate lawyer Dennis Riordan estimated it could take as long as 18 months for a decision.

Bonds was convicted of giving evasive answers to a grand jury investigating a Northern California-based steroids distribution ring.