Searching Old I-797 Approval Notice Based on Passport Number

[rayoflight]

Hi,

I had an approved H1B visa back in 2010 and I have lost the I-797 Approval Notice. I am applying for a new L1B visa not and need the details of my old I-797 Approval Notice. Is there a way I can search it? The H1B was with a different employer and now I am applying for L1B with a different employer.

All I have is Passport Number and year of approval.

Thanks,
rayoflight