He will be able to get H1 extension on basis of pending I-485gp111 said:You Husband cannot file I-140 on your LC.. What you have to do is file I-140/485 concurrently for you & file I-485 for him as dependent. .
HI GP
Something is not correct here.
Dependents are derivetive benefits of allien. Spouse can work only on EAD as derivite benifit. Spouse can have H4 (no job) or EAD (Job), No extensions and Whatever happens for final adjudications will also effect spouse.
In this case If he wants to extend his H1 he has to Start GC processing himslef.