The Winklevoss brothers, Cameron and Tyler, have failed in their latest bid to re-open their case against Facebook founder Mark Zuckerberg, whom they accuse of stealing their original idea of hugely popular Facebook.
The twins had asked the 9th US Circuit Court of Appeals in San Francisco to reconsider its April ruling upholding the $65 million settlement from 2008, saying that Facebook concealed information and they should have received more Facebook shares.
In April, a three-judge panel decided not to scrap the original settlement and not to allow a fresh case to begin.
In their latest move, the Winklevoss twins asked for a full panel of 11 judges to review that decision but the appeal was rejected. The twins apparently intend to appeal to the US Supreme Court.
The 2008 settlement gave the brothers a meagre $20 million in cash and $45 million of stock valued at $36 a share. However, the shares are not yet traded anywhere, and the brothers say that they were conned because internally the shares were only valued at $9.
The Winklevoss brothers claim that mark Zuckerberg stole their website idea while they were all students at Harvard, something Mr Zuckerberg denies.