USPTO granted patent US12589182B2 to the University of Virginia Patent Foundation on March 31, 2026. The patent covers occlusive implant compositions and methods for non-surgical vas-occlusive contraception, including percutaneous delivery of occlusive substances into the vas deferens under ultrasound imaging guidance. The technology also encompasses methods for reversing vas-occlusive contraception and methods for delivering therapeutic agents to the vas deferens lumen. The patent contains 15 claims and names inventors John C. Herr, Alexander L. Klibanov, and Kevin Simon Eisenfrats.

This patent grant represents intellectual property protection rather than a regulatory requirement. Organizations developing competing contraceptive technologies, medical device manufacturers in the reproductive health space, and pharmaceutical companies researching non-surgical male contraception should review this patent to assess potential freedom-to-operate implications or licensing opportunities. Patent monitoring of related USPTO filings in CPC classes A61F 6/20-6/225 may identify future developments in this technology space.