The real problem happens when stories try to tie events in the Marvel Universe to real-life events or persons. If Captain America got frozen in 1945, then the Avengers unfroze him in Avengers #4 in 1963. That means he's barely eighteen years a man out of time. But if we guesstimate that in today's Marvel Universe, Capsicle got thawed circa 2000 at the earliest well, he missed a whole a lot more, including the presidency of Ronald Reagan, who, according to canon, got turned into a snake under his watch (Cap #344, 1988). That means that Ben Grimm and Reed Richards, who began their careers described as WWII veterans...ain't. Not anymore.
Which explains how, in 1973, you could actually believe that J. Jonah Jameson had been around the Daily Bugle since the war years, right?
Panels from Sgt. Fury #110 (May 1973), script by Gary Friedrich, pencils by Dick Ayers, inks by Vince Colletta, letters by Herb Cooper
There's some other small references elsewhere in the book, which also shows that Nick Fury knows Jameson:
So, it's canon, fanboys: J. Jonah Jameson is functionally immortal because he has taken the Infinity Formula.
Glad I could clear that up for you.