SAN FRANCISCO — Lawyers for Orrick, Herrington & Sutcliffe in Silicon Valley have helped former Microtune Inc. General Counsel Nancy Richardson beat most of the stock option backdating charges filed by the Securities and Exchange Commission in 2008.

On Feb. 15, U.S. District Judge Jane Boyle in Dallas granted motions for summary judgement filed by Richardson and Microtune’s former CEO, Douglas Bartek, saying the SEC waited too long to file a complaint after learning about potential misconduct. Richardson was represented by Orrick securities partner Susan Resley in Menlo Park.