The Wisconsin Alumni Research Foundation claims that Intel absconed with its IP.

The complaint charges that in 1998 four researchers at the University of Wisconsin, Madison campus, including the current chair of its Computer Science department, a Professor Gurindar Sohi, developed a way to enhance instruction level parallelism in microprocessors, specifically a speculation circuit that helps execute instructions out of order.

WARF claims they contacted Intel in 2001 and tried to get Intel to license the technology, and as no deal was struck, it is now asking the court to stop Intel from infringing the patent (ie stop shipping Core 2's) and for fees and damages.