-- Issuance of U.S. Patent No. 11,992,472 Further Strengthens Evofem's Intellectual Patent Portfolio -- -- Newly issued patent is Evofem's fifth covering Hormone-Free "In the Moment" Contraceptive Phexxi in the United States -- SAN DIEGO, June 11, 2024 /PRNewswire/ -- Evofem Biosciences, Inc. (OTCQB: EVFM) today announced that the United States Patent and Trademark Office (USPTO) has issued U.S. Patent No. 11,992,472, which covers composition and methods for contraception with a composition that encompasses ...