L1B extension Visa expires (total 5 years) but stayed 3 Years 6 Months. Can it be extended?

[Mathivanan Sampath]

I got L1B visa in 2008 June and travelled to US in 2009 October. My Visa expired on 2011 June and got extension for 2 Years. It will be expired in 2013 June. In total continuosly I stayed 3 Years 3 Months. Can I file for extension for one more year?

Is the 5 years limit is for the VISA period or the total stay?