Last time we checked in on the ongoing U.S. patent-related court cases between Apple and Samsung, Apple’s lawyers were requesting to add the Galaxy S III to its previous motion for a preliminary injunction against the Galaxy Nexus line of products from February.

Apple was hoping the courts would agree to withhold sales of the S III until a ruling on the preliminary injunction was made. Samsung recommended the judge dismiss Apple’s request and file a new motion, but Apple attorney Josh Krevitt threatened Samsung at a hearing on Thursday that Apple could file a temporary restraining order as early as today to stop sales of the S III before it launches June 21. Bloomberg reported:

Josh Krevitt, a lawyer for Cupertino, California-based Apple, told Koh he was considering filing a request for a temporary restraining order in the interest of blocking sales of the Galaxy S III before its scheduled release in the U.S. this month… Krevitt said a court order temporarily barring Galaxy S III sales in the U.S. will create “a mechanism to allow the court to decide this issue before the launch.”

First Samsung will have to prove in court today that the Galaxy S III includes a “different combination of features” from the Nexus in order to prevent Apple from adding the device to the previously requested preliminary injunction. According to Bloomberg, Samsung lawyer Bill Price claimed: “Apple’s urgency stems from its inability to “compete against the new features” of the Galaxy S III, and the company is trying to “prevent a phone from getting to the public that is better than Apple’s in many, many respects.”

Reuters noted that several Google attorneys attended Thursday’s hearing. If Apple files for a temporary restraining order, the scheduled July 30 trial date would likely be delayed. Apple is also trying its best to kill HTC.