Round One was in 2005
Facebook sought to trademark the word in December 2005. Since then, no one has filed an opposition to the proposed trademark, Lynch said. Aaron Greenspan, a former Harvard student who owns a mobile payment system called FaceCash, asked for more time to oppose the application, but never filed any objection within the extended time period.
Next Mission: The Other Half
Facebook, which is based in Palo Alto, Calif., is also trying to rein in use of the other half of its name. In August, it filed a trademark infringement lawsuit against Teachbook.com, an online community for teachers.