It's impossible to tell since your H4 can only be approved if the L1b extension is granted. Generally, it is not a good idea to file multiple applications, all pending at the same time, to try to cover all possible bases.
The above is intended only as general information, and does not constitute legal advice. You must speak with an attorney to discuss your individual case.
Estimated processing times are always as posted on the USCIS website.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.
I agree with my colleagues.
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