
Xencor Extends U.S. Patent Term for Xtend™ Antibodies, Extending Ultomiris Royalties to 2028

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Xencor Inc. announced the extension of U.S. Patent 12,492,253 for its Xtend™ Fc domain technology, prolonging the Ultomiris® royalty term to December 2028. This extension adds approximately three years to the previous patent expiry, with expected royalty revenue exceeding $100 million to $120 million. The news was generated by Public Technologies using AI and is for informational purposes only.
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