They were suppressed through collars, though. Wolverine and a few others were free-ranging operatives. Was there any indication in the story that Wolverine had ever been captured and collared? It would seem pretty much impossible to keep a collar on him, seeing as how his claws (at the time the story was written) were bionic.
What all this then about adamantium skeletons? I don’t follow X-men (or any comics, any more) but I distinctly remember reading on this very board that Magneto had stripped the adamantium from Wolverine’s body.
Also, should I take it as a consensus that you can’t grow additional Wolverines just by cutting the existing one up the right way?
Now, it’s been a long time since I read his stuff, but I’ve heard people elsewhere talk about how it’s gotten to the point that he literally can’t die unless he wants to die.
And it was “The Crystal of Ultimate Vision” in the Citadel of Light and Shadow.
He got better. (Wolverine #145)
The Healing Factor has no specific power limit; it just depends upon the writers. Usually, he can regenerate fairly quickly from most injuries. Superficial wounds heal in seconds, major (would-be fatal) ones in a few minutes.
For those not in the know, they retconned at one point that the Adamantium Skeleton lacing Wolvie’s bones weakened his healing factor, and that previously he could regenerate almost any wound almost instantly. This was rather stupid and the entire episode has been largely forgotten.
He got it back. IIRC, he later lost it AGAIN, and got it back again.
Not that I’ve heard. Although I’ve heard it suggested that you could solve the energy crisis by using ever-regenerating Wolvie-flesh as fuel for a perpetual motion machine . . .
Was he completely incinerated? If his skeleton was intact, his brain and bone marrow might have survived (albeit badly injured) inside his metal bones.
God knows where he got the energy to grow back from something like that, though. Maybe he just grew back a rudimentary muscle, nerve, and digestive system, and devoured passersby as a gruesome pseudo-zombie until he had enough chemical fuel?
:: pause::
And, if so, when can we expect a Marvel Legends figure version of that? 
There was an issue, somewhere in the 170s, I think, where Mystique fought the X-Men and ended up killing all of them except for Nightcrawler. Wolverine she took out with a slash to the throat, the explanation being that he couldn’t heal fast enough to avert ex-sanguination.
Of course, it turns out she was in a danger-room like exercise after hiring . . . oh, what’sisface, the crazy redheaded carnival guy . . . to provide her with the experience, including X-Men androids.
So, yeah, if there’s one thing the writers and editors haven’t been consistent about, it’s Logan’s healing factor.
[sub]I’d still do him.[/sub]
Arcade.
Arcade!
Just to give you relief from the mental equivalent of walking round in shoes half a size too tight. 
ETA: Beaten to it by Otto and his speedy fingers.
That’s what you get for editorializing instead of just answering the question.
Wasn’t Sabretooth’s first “appearance” when he sneaks up on Wolvie from behind (coming out of the water while Wolvie’s leaning against a rail, IIRC) and tears Wolvie’s throat out?
As I remember that story, clamping a hand over his neck headed that little dilemma off at the pass.
Wolverine’s been answered, but just as a little trivia…it WOULD (or would have) worked for Lobo, who is, essentially the Spinal Tap version on Wolverine. Until he was genetically altered by Vril Dox, if Lobo were injured, every drop of blood would regenerate into a complete clone of Lobo. His regeneration is still pretty massively insane, so, who knows how it’d work if he were bifurcated vertically. Obviously, nobody’s stupid enough to try, as two Lobos is a terrifying concept.