After H1B expire how many days i can stay in US, extension is filed.

Hi,

My H1B is going to expire by 14th Oct 2013.

My company filed extension but they did it as normal process.

I got receipt number and status is intial statge.

My question is,

1.staying in US after my visa approval is legal(as i have applied for extension)?

2.If legal how many days i can stay ?

3.For stamping did i need to come back to india after my extension approval ?

  1. If stampping is not mandatory then how can my I94 will get change ?

Your help is highly appreciated.

Regards,

Rajesh Kumar