Due to him and I being in business together. . . .
Are you talking about the roommate who moved out in October 2015 or the new roommate?
I'm wondering if anyone can tell me since his name is still on the lease until april 2017(two year lease) if he is entitled to pay the rent and utilities until then.
Here, I assume you're talking about the roommate who moved out in October 2015. In any event, yes, he's "ENTITLED to pay the rent and utilities." ANYONE is "entitled" to do that. If your intent was to ask whether he's OBLIGATED to pay, unless your lease is very unusual, all four of the tenants are obligated to the landlord for the payment of rent (and anything else provided for in the lease) until the lease is terminated. I would also argue that an implied contract exists between the four roommates to the effect that each roommate is obligated to the other roommates for the agreed share of rent. However, one would have to do some legal research to confirm that such an obligation would be enforceable (unless, of course, the four of you entered into a roommate agreement that expressly spelled out your rights and responsibilities with respect to each other).