B公司的POLICY就是revoke 140 一旦离开B公司。google 一些条款。
We may have multiple I-140 petitions.
(e) Retention of section 203(b) (1), (2), or (3) priority date. A petition
approved on behalf of an alien under sections 203(b) (1), (2), or (3) of the
Act accords the alien the priority date of the approved petition for any
subsequently filed petition for any classification under sections 203(b) (1)
, (2), or (3) of the Act for which the alien may qualify. In the event that
the alien is the beneficiary of multiple petitions under sections 203(b) (1)
, (2), or (3) of the Act, the alien shall be entitled to the earliest
priority date. A petition revoked under sections 204(e) or 205 of the Act
will not confer a priority date, nor will any priority date be established
as a result of a denied petition. A priority date is not transferable to
another alien.