Actor Jason Patric has been fighting for custody of his 4-year-old son Gus for nearly a year.

His ex-girlfriend, Danielle Schreiber, is now filing a restraining order that would ban Patric from saying Gus' name or showing his face anywhere in public or in private without her permission, CNN's Chris Cuomo reports.

The ruling would impact "Stand up for Gus" – Patric's organization that aims to help other unmarried dads in similar custody battles. Though the actor says everything he's done has been for his son – whom he longs to be reunited with.

"She wants to take away my constitutional, First Amendment rights," Patric said, adding that if she is successful, everyone's right to freedom of speech is endangered.

Thanks to a loophole in California's law on sperm donors, a man whose sperm is used by a fertility clinic must have agreed in writing to their plans to co-parent. Otherwise, he is not considered the natural father.

Patric says he and his ex-girlfriend, Danielle Schreiber, tried to have a baby together for years before eventually getting pregnant through in-vitro fertilization using Patric's sperm. But Schreiber says she was always supposed to be the sole parent.