List all the mature brands of Sanofi USA which have significant revenues even after patent expiration after many years?

Sanofi's Mature Brands with Significant Post-Patent Revenue

1. **Dupixent**: Despite patent losses, Dupixent continues to contribute significantly to Sanofi's revenue. Its strong performance in immunology, vaccines, and rare diseases helps offset declines from other products.
2. **Other Brands**: While specific revenue figures for individual brands post-patent expiration are not available, Sanofi's diverse portfolio and robust pipeline ensure continued cash flows from a range of products. This includes vaccines like Fluarix and Neulasta, which are key contributors despite patent expirations.

In summary, Sanofi's strategic positioning and product diversity allow it to maintain substantial revenue from its mature brands, even following patent expirations.