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Free PSA Test Awarded US Patent

Free PSA Test Awarded US Patent

ABBOTT PARK, Ill--Abbott Laboratories and the Finnish-based company Wallac Oy, a subsidiary of EG&G Inc. (Wellesley, Mass), have received a US patent for two methods of assaying free PSA (prostate-specific antigen).

The patent was issued to two inventors, Dr. Ulf-Hakan Stenman, of Helsinki University Central Hospital, and Dr. Hans Lilja, of Lund University.

The inventors gave exclusive rights to Wallac, which subsequently granted a sublicense to Abbott. The patent covers immmunoassays for free PSA and the use of the ratio of free-to-total PSA to better distinguish between prostate cancer and benign prostatic hyperplasia (BPH).

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