Immigration Law Questions? Ask an Immigration Lawyer.
Thank you for your question. I look forward to working with you to provide you the information you are seeking for educational purposes only.
If your L1-B is valid until 2018, then all your employer needs to do is file a new I-129s for your new period of stay and that would be your grant of admission to the US to work for your employer. You do not need a new visa application, the I-129s is your visa for your entry to the US.
Thank you for your reply.
The visa is "stamped" when you come to the country at the immigration desk, that is different and has nothing to do with the I-129S which is your visa authorization to enter to work. So when you return you present the I-129S with your L1-B visa and passport at the Immigration Desk and they will stamp the L1-B at point of entry.
Thank you for your reply.If you did not commit any crimes here or in your country since the last time you were here, then I see no reason why the entry under your L1-B would be denied.