Confusion on I-797B dates and H1B visa end date

USA H1B Visa
1

My I-797B from cap is valid till 30th Oct 2014.My visa stamping was put on hold due to change in client and location .Now I need to submit for amendment and it seems my company has kept end date same as 30th Oct 2014.

Questions from my side:

1)It will probably take 12-16 weeks for amendment which means I will get LCA by mid July and with visa stamping it will go to end July.Once H1B visa is stamped , will the end date of visa remain same as 30th Oct 2014 or it is generally granted for 3 years?

2)If I go to US in August, I will have another 3 months before petition expires.Once I reach there can I file for extension and if so is there a chance of getting petition extended within 30th Oct 2014 time frame OR do I need to come back and file fresh petition

Can anyone help in clearing doubts?

2

  1. Visa will be granted only until petition end date.

  2. Yes, extension can be filed while you are in US. You can ask your employer to keep all paperwork ready and file for extension as soon as you reach US.