I hope you will find tomorrow that the cancer has not spread.
I lost my father to cancer this year. He would still be with us if his surgery had gone well. We've lost many family members to cancer, too. But it is beatable with the right doctors. My father had the wrong doctors.
I know nothing of this man and his invention. But, in desperation, we searched and came across so many promising treatments that we realized later were scams. But there was one treatment that I believe might've helped - intravenous Vitamin C. Local doctors as well as a medical center associated with a well-respected university hospital is now trying IVC, so it is sounding more and more credibile as a treatment. Not much money to be made from Vit C, though, which explains the lack of interest in it.
Thanks. I hold out great hope always. I am sorry about your loss.