Query regarding Cap exempt H1b visa renewal

Would like to know if I am eligible for Cap Exempt H1b visa renewal.

a) Per I-797B - Receipt Date - 11th October 2011
b) Per I-797B - Notice Date - 14th February 2012
c) Per I-797B - Notice Type - Approval Notice (Class - H1b)
d) Per I-797B - Valid from 14th February 2012 to 1st October 2014
e) Stayed in US - from 1st April 2012 to 9th November 2012
f) Visa was expired on 1st October 2014

Total stayed 7 months in the US

Till which date I can go for a cap exempt h1b renewal, which date drives the 6 year time frame.