Dr. Goodenough just won a Nobel Prize at age 97 (for contributions to what became lithium-ion batteries). I remember this profile of him from three few years ago in the NYTimes: “To Be A Genius, Think Like A 94-Year-Old.”
https://www.nytimes.com/2017/04/07/opinion/sunday/to-be-a-genius-think-like-a-94-year-old.html
>>"[I]n the United States, the average inventor sends in his or her application to the patent office at age 47, and that the highest-value patents often come from the oldest inventors — those over the age of 55."