L1 i94 extension on passport renewal

My L1B visa is valid till august 2017 . Since my passport was getting expired , I got i94 expired date same as my old passport expiry date. Now , I got my new passport and my employer applied for i94 extension. My i94 will be expired on next week . It seems i94 extension application received by UCSIS . However , receipt is not generated yet. How long i can stay . Any suggestions.

You can stay for up to 240 days beyond I-94 expiration date as long as your extension petition was timely received by USCIS.

Thanks Sourabh for the response.