When does.the patent on mounjaro expired?

The question of when the “Mounjaro” (tirzepatide) patent expires is a little more nuanced than a single date, because Eli Lilly holds a portfolio of patents covering the drug’s composition of matter, formulation, method of use, and manufacturing processes.

Key points

These dates are the standard 20‑year term from filing, assuming no extensions, re‑examinations, or post‑expiry litigation that could shift the effective expiration.

Bottom line

• The primary composition‑of‑matter patent (US 10,987,497) has not yet expired; it is projected to expire in July 2029.
• Other related patents may expire later (e.g., 2031, 2033, etc.).
• Eli Lilly has a strategy of filing supplementary patents to extend commercial exclusivity beyond the original expiry dates.

So, as of now (2024), the core Mounjaro patent is still in force and will not expire until around mid‑2029. If you’re interested in a specific claim or jurisdiction, let me know and I can dig deeper.