Stan Lee , pioneer of the Marvel universe, died from heart failure and respiratory failure, according to a death certificate obtained by TMZ .

The co-creator of Marvel comic book characters such as Spider-Man, Thor, the X-Men, the Fantastic Four, Black Panther and the Avengers died Nov. 12 at the age of 95 after being rushed to a Los Angeles hospital.

TMZ reported that in addition to heart and respiratory failure, Lee also suffered from aspiration pneumonia, which occurs when you inhale food, drink, vomit or saliva into your lungs , according to the Mayo Clinic.

The obtained death certificate noted that Lee was cremated and that his ashes were given to his sole heir, his daughter Joan Celia.

Lees wife, Joan B. Lee, died in July 2017 at the age of 93. The two were married for 69 years.