It follows a meeting with Anfield chief executive Rick Parry, who visited the Kraft family for an NFL game.
Kraft, whose family owns the New England Patriots NFL team, told BBC Sport: "Liverpool is a great brand and it's something our family respects a lot."
"I've known them since 2001 and had an invitation to visit the Gillette stadium, one of the USA's few privately-funded stadia," said Parry.
He added: "It gave us a chance to discuss the way they funded the ground's construction."
Liverpool are still intent on moving to a new stadium, but the estimated price of the proposed new development has risen from £80million to £150million, so it is believed the Liverpool board think outside investment is inevitable.
