My I-140 from Company A was approved on 2/29/2016. I changed my job to company B on 3/7/2016. I have already completed my 6th year of H1B on 03/15/2016. My present H1 will expire on 7/15/2017. The company B has assured that they will start my PERM process in about a month,sometime in September. I am getting very anxious about two things. First, How do I actually check if company A revoked my I-140 ? (Of course without asking them ). I don't want to ask until that is the only option. Secondly, if they have already revoked, is there any way to continue my H1B visa ?