Patent Issues
Hoffmann-La Roche eventually bought the PCR and Taq patents from Cetus for $330 million, from which it may have received up to $2 billion in royalties. In 1989, Science Magazine named Taq polymerase its first "Molecule of the Year". Kary Mullis received the Nobel Prize in 1993, the only one awarded for research performed at a biotechnology company. By the early 1990s, the PCR technique with Taq polymerase was being used in many areas, including basic molecular biology research, clinical testing, and forensics. It also began to find a pressing application in direct detection of the HIV virus in AIDS.
In December 1999, U.S. District Judge Vaughn Walker ruled that the 1990 patent involving Taq polymerase was issued, in part, on misleading information and false claims by scientists with Cetus Corporation. The ruling supported a challenge by Promega Corporation against Hoffman-La Roche, which purchased the Taq patents in 1991. Judge Walker cited previous discoveries by other laboratories, including the laboratory of Professor John Trela in the University of Cincinnati department of biological sciences, as the basis for the ruling.
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