Did Voldemort make use of a Horcrux already?

[Inge]

No: HPFGUIDX 165529

As most other subjects, this has probably been discussed earlier, 
but I'm wondering if maybe Voldemort already used one of the 6 
Horcruxes which he created.

What makes me ask is parts of the following speaches from Voldemort 
in GOF, chap The Death Eaters

1) (p 562): "And then I ask myself, but how could they have believed 
I would not rise again? They, who knew the steps I took, long ago, 
to gueard myself against mortal death? They, who had seen proofs of 
the immensity of my power, in the times when I was mightier than any 
wizard living?"

and later

2) (p 566): "I was ripped from my body, I was less than spirit, less 
than the meanest ghost... but still, I was alive. What I was, even I 
do not know... I, who have gone further than anybody along the path 
that leads to immortality. You know my goal - to conquer death. And 
now, I was tested, AND IT APPEARED THAT ONE OR MORE OF MY 
EXPERIMENTS HAD WORKED... (my highlights) for I had not been killed, 
though the curse should have done it."

Ok, to me it appears that at the time Voldemort was hit by the 
backfiring AK, he may have "died" and lost the soul-piece inside 
him, which was at that exact moment replaced by one of the Horcruxes.

Too far off?

Inge