This is Jean Hilliard (1980)
Jean was involved in a car accident in December of 1980 which resulted in car failure in sub zero temperatures. She decided to walk to her friend’s house which was two miles away, but collapsed 15ft outside the door. During the night, temperatures dropped to -22 °F (-30 °C) and she was found frozen solid at 7am after six hours in the cold. Once they had transported her to the hospital, doctors found that her skin was too hard to pierce with a hypodermic needle, her body temperature was too low to register on a thermometer, her eyes were solid with no response to light and her pulse was approximately 12 beats per minute.
They wrapped her in an electric blanket and she made a full recovery. She was released from the hospital after 49 days with no permanent damage to her brain or body aside from frostbite.
Wiki:
https://en.wikipedia.org/wiki/Jean_HilliardSnopes:
http://www.snopes.com/medical/myths/jeanhilliard.asp