In order to be given a "fresh" six year period after having used up your 6-year maximum in H-1B classification you will be required to depart the US for a full twelve-month period before being allowed to re-apply for a new H-1B. You cannot depart in December (2013) and file in April 2014 since you have not been physically absent from the US for at least the requisite twelve months at the time of filing.
Answered on Dec 20th, 2013 at 5:58 AM