Media Releases › Sienna Cancer Diagnostics View All Sienna Cancer Diagnostics News Sienna Granted U.S. Patent for its hTERT IVD 01 Jul 2019 05:14 PM U.S. Patent No. 10,338,072 granted to Sienna by the United States Patent and Trademark Office Provides patent protection for Sienna’s hTERT test to 2035 For more information, download the attached PDF. Download this document