Patent 11839689
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
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No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.
Cases on file (2)
Group view →Specific litigation cases in our database that name US patent 11839689. The free-form analysis below may also discuss cases beyond this list.
- Astellas US LLC et al. v. Dr Reddys Laboratories Ltdfiled Apr 17, 20263:26-cv-04101New Jersey District CourtOpen
Defendants: Dr Reddys Laboratories Ltd
Other patents asserted: 12161628, 12447128, 12502357
The accused products are generic versions of Xtandi 40 mg and 80 mg tablets.
- 2:24-cv-09403U.S. District Court for the District of New JerseyActive
Defendants: Various ANDA Filers
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Based on the legal status information provided for US patent 11,839,689 and cross-referencing with public litigation databases, the following lawsuits involving this patent have been identified. These cases are part of the broader litigation surrounding generic versions of the drug Xtandi® (enzalutamide).
As of today's date, May 1, 2026, these cases are understood to be active, with no final, unappealable judgments rendered.
Litigation Summary
| Plaintiff(s) | Defendant(s) | Jurisdiction | Case Number(s) | Filing Date(s) | Status / Outcome |
|---|---|---|---|---|---|
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers (details specific to each case) | U.S. District Court for the District of New Jersey | 2:24-cv-09403 / 3:24-cv-09403 |
2024 | Active/Ongoing |
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers | U.S. District Court for the District of New Jersey | 3:24-cv-09748 |
2024 | Active/Ongoing |
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers | U.S. District Court for the Eastern District of Pennsylvania | 2:24-cv-03747 |
2024 | Active/Ongoing |
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers | U.S. District Court for the Western District of Pennsylvania | 2:24-cv-03747 |
2024 | Active/Ongoing |
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers | U.S. District Court for the District of New Jersey | 2:24-cv-08217 / 3:24-cv-08217 |
2024 | Active/Ongoing |
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers | U.S. District Court for the District of New Jersey | 3:25-cv-00578 |
2025 | Active/Ongoing |
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers | U.S. District Court for the District of New Jersey | 3:25-cv-13779 |
2025 | Active/Ongoing |
| Astellas Pharma Inc., Medivation Prostate Therapeutics LLC | Various ANDA Filers | U.S. District Court for the District of New Jersey | 3:25-cv-15434 |
2025 | Active/Ongoing |
Citations for the litigation information are derived from the legal events data provided for US patent 11,839,689 on Google Patents, which aggregates data from sources like Darts-ip and Unified Patents. The case numbers link to these dockets (e.g., https://portal.unifiedpatents.com/litigation/New%20Jersey%20District%20Court/case/2%3A24-cv-09403).
Generated 5/1/2026, 10:58:53 PM