If I got I-140 approved from Employer A and lets say I applied for my wife's H4 EAD based on this approved I-140 and it got approved. Then I moved to Employer B. Then Employer A revoked 140. What happens to the already approved H4 EAD? I understand that the H-4 EAD will remain valid as long as I maintain a valid H-1B status. But what happens if my Employer A revokes my I-140 after I switch to Employer B?I am very sure my current Employer A will revoke my I-140 AS SOON AS I switch to Employer B.