The US Patent and Trademark Office has upheld the two remaining stem cell patents out of a contested trio held by the Wisconsin Alumni Research Foundation (WARF), according to the final ruling posted last week by the USPTO. The third patent was upheld in a ruling last month (read more linkurl:here); and can still be challenged by appeal. Last week's rulings are final and cannot be appealed. "The patent office has conducted a thoughtful and thorough review of all three patents and we applaud this final decision on our two most important base stem cell patents," Carl Gulbrandsen, managing director of WARF said in a statement. The two patents are known as "780" and "806" (for US Patents. 5,843,780 and 6,200,806) and cover technology on culturing and maintaining human embryonic stem cells from pre-implantation embryos. This was the original work of linkurl:James Thomson,; from the University of Wisconsin, Madison, who...

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