I-140 withdrawl by employer still can we port the priority date?

[svsn]

Hi,
I am working for company A with I-140 approved with 6 years H1b cap completed and would like to change company to B, if some reason my employer withdraws my I-140, still is that I140 valid for to Port my Priority date with new company B?

Please help in this matter with correct information.

Thanks!

[sree52]

According to my knowledge, it is very hard to get H1b extension beyond 6 years if I140 is revoked. But i think you can still retain the PD if your new employer files new Perm/I140