Already answered that MR can’t be transferred to UAL but I just wanted to add on that they can only be transferred to accounts in the main persons name.
Chase is the same way so if he had a transferable point earning card he could only transfer them to his UAL account however UAL allows pooling and you could create a pool and invite your husband and then he would be able to add those to your United Pool. Only bad thing I can see is that the Pool is only able to book UAL specifically and not partners plus it takes 24 hours once you add to the pool for them to be useable.
I wish other airlines would allow this pooling as it would really help families.