[mft_]

Just for clarity, neither drug is FDA approved in the conventional sense (i.e. not approved to be sold). However, both SD-101 and also various anti-OX40 MAbs are in clinical trials.

Also for clarity (and responding to the concerns of the original questioner) it's highly unlikely that this combination will be patented by anyone - this isn't how patents are used in drug development. Anyone with access to the necessary drugs would --in theory-- be free to open a clinical trial to test this approach.