H1b visa - Start date question

[rrao999966]

Hello Folks,

 

I am on H1b, my current petition expires in July 2016. My employer has filed extension and it got approved with start date from July 2016 to end date July 2019.

 

I am planning to visit India in April first week and I need to attend visa interview as I currently do not have valid visa in my passport. Once I attend the interview, what would be my visa start date as I have two petitions now (Current petition and extension petition). Can I expect immediate visa start date and end date till July 2019 OR start date from July 2016 to end date July 2019 OR immediate start date till July 2016.

 

Also do I need to show my current petition and extension during the interview.

 

Thanks for your help.