Examiners of the U.S. Patent and Trademark Office have revoked three patents already issued on embryonic stem cell lines because the cells patented by James A. Thomson and owned by the Wisconsin Alumni Research Foundation are the same or obvious variations of cells already claimed in previous patents issued or reported in scientific journals. The decision, while preliminary and appealable, means the patents could be narrowed or revoked altogether, freeing the stem cell lines for research by others.

Full Story:

Related Summaries