The link in the article "After wrestling with the choice" has more coverage of the procedure. It says they initially only intended to have the experiment last a month, but it was going so well that they asked permission of his sister to delay the memorial and extend one more month.
> So the kidney worked, just not in a true living recipient
In the spirit of "the operation was a success, but the patient is dead" or "the launch was a success but the rocket crashed" or "the self driving car needs a driver". /s