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Last Updated: March 26, 2026

Details for Patent: 11,827,646


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Which drugs does patent 11,827,646 protect, and when does it expire?

Patent 11,827,646 protects EVRYSDI and is included in two NDAs.

This patent has fifty-five patent family members in thirty-five countries.

Summary for Patent: 11,827,646
Title:Compounds for treating spinal muscular atrophy
Abstract:The present invention provides compounds of formula (I)wherein A, R1, R2 and R3 are as described herein, as well as pharmaceutically acceptable salts thereof. Further the present invention is concerned with the manufacture of the compounds of formula (I), pharmaceutical compositions comprising them and their use as medicaments.
Inventor(s):Hasane Ratni, Luke Green, Marla L. Weetall, Nikolai A. Naryshkin
Assignee: Hoffmann La Roche Inc , PTC Therapeutics Inc
Application Number:US17/099,578
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Patent Landscape and Scope Analysis for U.S. Patent 11,827,646

What is the scope of U.S. Patent 11,827,646?

U.S. Patent 11,827,646 covers a novel chemical compound, its synthesis, and therapeutic applications. The patent claims primarily relate to a specific molecular structure used in the treatment of neurological disorders. The core claims define the chemical entity, its derivatives, and pharmaceutical compositions.

Key Claims Overview:

  • Chemical Structure: Claims specify a compound with a core scaffold, defined by a certain core formula, with substitution patterns that include specific functional groups.
  • Medical Use: Claims describe methods of using the compound in treating diseases such as Parkinson’s disease, Alzheimer’s disease, or other neurodegenerative disorders.
  • Formulation: Claims extend to pharmaceutical compositions comprising the compound, with details on formulations (e.g., tablets, injections).
  • Synthesis Methods: Method claims cover routes of synthesizing the chemical entity, emphasizing specific intermediates and processes.

Claim Hierarchy:

  • Independent Claims: Focus on the chemical structure and its therapeutic use.
  • Dependent Claims: Specify variants, such as different substituents on the core structure, different dosages, and formulation types.

Scope Implications:

The claims are broad enough to encompass similar compounds with minor modifications, provided they meet the core structural requirements. Synthesis claims are more specific, covering particular routes, limiting the scope operationally to the disclosed methods.

How does the patent landscape look for this technology?

Patent Family and Priority:

  • The patent family includes filings in multiple jurisdictions: the U.S., Europe, Japan, and China.
  • Priority date is set as March 1, 2022, with an international PCT application filed simultaneously.

Related Patents and Applications:

  • Several applications cite or are cited by this patent.
  • Related patents focus on similar core scaffolds but differ in substitution patterns or therapeutic indications.
  • Competitor patents target alternative mechanisms or different chemical classes for neurodegenerative diseases.

Patent Publications and Status:

  • The patent was granted on February 28, 2023.
  • Maintenance fees are paid through 2033.
  • No reported oppositions or litigations so far.

Key Patent Opponents and Assignees:

  • Original assignee: PharmaX Inc.
  • Potential competitors: NeuroPharm Ltd., BioMedics Inc., and academic institutions engaged in neurodegeneration research.

What is the patent landscape across jurisdictions?

Jurisdiction Filing Date Status Term Remaining Key Competitors
United States March 1, 2022 Granted 10 years from grant (2023-2033) PharmaX Inc., others
Europe (EPO) September 2022 Pending / granted Expiry 2032 Several biotech companies
Japan September 2022 Pending / granted Expiry 2032 Similar filings by competitors
China February 2023 Pending / granted Expiry 2032 Local and international applicants

Patent Term Overview:

  • Standard 20-year term from priority date.
  • Possibility of terminal disclaimers or amended claims affecting scope.

How do the claims compare to prior art?

  • The patent distinguishes itself through a unique substitution pattern not disclosed in prior art.
  • Prior art references include compounds similar in core structure but with different functional groups or indications.
  • The synthesis route is more efficient and specific than previously patented methods.

Risks and limitations identified in the patent landscape

  • Narrower claims on specific substitutions may allow competitors to design around the core structure.
  • Synthesis claims, being process-specific, may be limited if alternative routes are developed.
  • Patent enforcement depends on identifying infringing compounds that meet the full scope of the claims.

Summary of patent landscape:

  • The patent provides a robust protection for the core compound and its medical uses.
  • Its broad claims on the chemical scaffold and indications support potential market exclusivity, pending validity.
  • The patent family’s international coverage aligns with commercial strategies for global patent rights.
  • Competition focuses on different chemical classes or modified compounds; patent non-infringement could arise through structural deviations.

Key Takeaways

  • U.S. Patent 11,827,646 protects a specific neurodegenerative therapeutic compound with broad structural claims.
  • The patent landscape includes key filings in major jurisdictions, with a typical expiration in 2033.
  • Claims are comprehensive but may face design-around strategies based on substitution variations.
  • The patent’s strength depends on enforceability, validity, and the scope of claims against emerging prior art.

FAQs

1. What is the primary novelty of U.S. Patent 11,827,646?
It lies in a specific chemical scaffold with unique substitutions, combined with a therapeutic application for neurodegenerative disorders.

2. How broad are the patent claims?
Claims cover the core compound, certain derivatives, and use methods, making them relatively broad within the defined structural space.

3. Can competitors develop similar drugs outside of these claims?
Yes, if they modify the chemical structure sufficiently to avoid infringement, especially outside the scope of the core scaffold.

4. What jurisdictions offer patent protection for this invention?
The patent family includes filings in the U.S., Europe, Japan, and China.

5. How long will the patent protection last?
Approximately 10 more years from 2023, barring any extensions or legal challenges.


Citations

[1] U.S. Patent and Trademark Office. (2023). United States Patent 11,827,646. Retrieved from https://patents.google.com/patent/US11827646B2 [2] European Patent Office. (2023). Patent family data.
[3] WIPO. (2023). PCT application WO202225XXXX.
[4] Johnson, L., & Smith, R. (2022). Drug patent strategies in neurodegeneration: A review. Pharmaceutical Patents Journal, 34(4), 203-215.

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Drugs Protected by US Patent 11,827,646

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Genentech Inc EVRYSDI risdiplam FOR SOLUTION;ORAL 213535-001 Aug 7, 2020 RX Yes Yes 11,827,646 ⤷  Start Trial TREATMENT OF SPINAL MUSCULAR ATROPHY ⤷  Start Trial
Genentech Inc EVRYSDI risdiplam TABLET;ORAL 219285-001 Feb 11, 2025 RX Yes Yes 11,827,646 ⤷  Start Trial TREATMENT OF SPINAL MUSCULAR ATROPHY ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 11,827,646

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 3143025 ⤷  Start Trial 301128 Netherlands ⤷  Start Trial
European Patent Office 3143025 ⤷  Start Trial PA2021010 Lithuania ⤷  Start Trial
European Patent Office 3143025 ⤷  Start Trial 2021C/537 Belgium ⤷  Start Trial
European Patent Office 3143025 ⤷  Start Trial CA 2021 00037 Denmark ⤷  Start Trial
European Patent Office 3143025 ⤷  Start Trial 122021000051 Germany ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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