Formula One Management have submitted trademark applications for merchandise and other items that related to grands prix in Las Vegas, New York and Miami.
The owners of F1 have been very keen from the outset about adding a second race in America to the calendar and the Las Vegas Review Journal has obtained documents that suggest the plans to make that a reality are well underway.
It was recently revealed that a plan for a 2020 race in Miami which incorporated the PortMiami tunnel in Florida City had been under consideration, but that radical proposal has since been ruled out.
However, Miami is still one of the leading contenders to host a second US race.
“We are exploring a number of possible venues for Formula One Grand Prix in a number of countries,” said Luca Colajanni, senior communications officer.
“We have made no secret that we are looking for destination cities, and regarding the U.S., Las Vegas has been mentioned alongside Miami and New York.
"They are part of a number of cities worldwide who have expressed their interest in hosting a Grand Prix.”