Eileen McDermott, New York and Eklavya Gupte,
The Wisconsin Alumni Research Foundation (WARF) was
celebrating last month after the USPTO issued favourable
decisions on three controversial patent applications for stem
cells. But two public interest groups who challenged the
patents have vowed to fight the latest rulings.
Last month, the PTO approved amended applications for two of
the patents (numbers 5,843,780 and 6,200,806), which claim
preparations of, respectively, primate and human embryonic stem
cells and methods for their isolation. In a separate decision,
on February 23, a third patent (number 7,029,913) was upheld by
the PTO following an obviousness challenge.
The technology in all three patents was developed by the
scientist who established the...