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Nippon Shinyaku.,Ltd. v. Sarepta Therapeutics, Inc.

21-cv-01015
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Case Summary

Nippon Shinyaku Co., Ltd. is suing Sarepta Therapeutics, Inc. in a dispute docketed as 21-cv-01015. The case has been active since 2021 and involves the pharmaceutical sector, with both companies holding interests in Duchenne muscular dystrophy treatments. The most recent filing is a notice, suggesting ongoing administrative or procedural activity. Given the parties' competing positions in the DMD drug market, the dispute likely centers on patent rights, licensing terms, or both. The docket number and filing volume suggest a mature, heavily litigated case.

No timeline activity recorded yet. This page will grow as rulings and filings land.

Key Issues

  • • Patent validity and infringement
  • • Licensing agreement disputes
  • • Pharmaceutical market competition in DMD treatments
  • • Claim construction
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Case Timeline

1 event
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Other April 20, 2026

1:21-cv-01015 Nippon Shinyaku.,Ltd. v. Sarepta Therapeutics, Inc.

Nippon Shinyaku filed a miscellaneous notice in its patent dispute against Sarepta Therapeutics in the District of Delaware (Case No. 1:21-cv-01015). The filing is docketed as entry 757, suggesting this case has generated substantial motion practice. Without the notice's contents, the precise trigger is unknown, but in high-stakes pharma patent litigation this type of filing often signals a procedural update, supplemental authority, or administrative matter the court needs to address.

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Press Coverage

1 article
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Sources tracked

1 outlet · 1 article

Timeline events

1 record on file

Last updated

1 hour, 5 minutes ago

Juryvine aggregates docket entries from PACER/CourtListener, press coverage, and GDELT signals. Ingestion timestamps do not appear in the What Changed feed — that reflects real court activity only.