Abstract
The U.S. Patent and Trademark Office (PTO) has upheld two key patents, on primate and human embryonic stem cells, held by the Wisconsin Alumni Research Foundation, giving WARF a solid victory in its hotly contested patent battle. Last month, PTO upheld a third patent, on stem cell culture techniques (Science, 7 March, p. 1323). The WARF patents, granted in 1995, 1998, and 2001, were challenged 2 years ago by two nonprofits that said the work was obvious and therefore unpatentable. The patent office disagreed, although it narrowed the patents slightly. We applaud this final decision on our two most important base stem cell patents, said the foundation's Carl Gulbrandsen.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
