Can I use Petition approved in 2004 (visa stamped but never used) now?

My H1B petition was approved in June 2004 and I got the visa stamped. I did not use that visa and it expired in March 2007. Can I used that petition now?

Yes. I have renewed my petition that was approved in 2007 (and valid upto oct 2010) in 2013. From what I heard, the petition is valid for 20 years for renewal.

Thanks for the information.
I read in one of the posts that the petition is valid for 6 years. Just wanted to confirm.

What is the procedure to renew it? Can I ask my current employer for it?

Thanks in advance!

You are not cap-exempt. The previous petition needs to have been approved within previous 6 years.

The other answer posted is incorrect.