Approved 140 and switching job

[starfish]

Hi,

I have PERM labor and i140 approved with current employer in EB2 category. The priority date is Nov. 2005. The problem is, since the project I am working on is near completion, its difficult for me to assume job secuirty after 1 year. hence I wanted to swicth the job right now and I have couple of years on H1B in hand so that I can get started with Green card at new company. My questions are -

1. With new employer can I use the priority date of i140 approved with old employer. (I know that I will need to file PERM labor and i140 again).

2. Is it true that I can use PD only if old employer does not revoke it. In that case is there a way for me to make sure old employer does not revoke it?

3. Incase I could not file Green Card with new employer soon, can I get 3 years of H1B extensions with new employer, after my 6 years of H1B are over (since I have i140 approved with old employer)?

I will really appreciate anyone can give me some brief guidance on this.

Thanks.

 

[eromero]

why do you need to file i140 request again? if you have i140 approved?
or is it that in the new i140 request yuo write somewhere that yiu have an already approved i-140?