Do I have to leave US?

[Oceans]

I applied for an extension of B2, still awaiting a reciept from the USCIS. My I-94 expires on July 13. Now, will my status be illegal right after July 13? Or I'll continue to remain "legal" until USCIS approves/denies my application?

[curiousone]

You remain in legal status until an aproval or denial is given by USCIS.