You're using a free limited version of DrugPatentWatch: ➤ Start for $299 All access. No Commitment.

Last Updated: December 19, 2025

Details for Patent: 9,839,637


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 9,839,637 protect, and when does it expire?

Patent 9,839,637 protects REXULTI and is included in one NDA.

Protection for REXULTI has been extended six months for pediatric studies, as indicated by the *PED designation in the table below.

This patent has thirty-five patent family members in twenty-nine countries.

Summary for Patent: 9,839,637
Title:Piperazine-substituted benzothiophenes for treatment of mental disorders
Abstract:The present invention provides a heterocyclic compound represented by the general formula (1): The compound of the present invention has a wide treatment spectrum for mental disorders including central nervous system disorders, no side effects and high safety.
Inventor(s):Hiroshi Yamashita, Nobuaki Ito, Shin Miyamura, Kunio Oshima, Jun Matsubara, Hideaki Kuroda, Haruka Takahashi, Satoshi Shimizu, Tatsuyoshi Tanaka
Assignee:Otsuka Pharmaceutical Co Ltd
Application Number:US15/697,196
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,839,637
Patent Claim Types:
see list of patent claims
Use; Composition; Compound; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of U.S. Patent 9,839,637: Scope, Claims, and Patent Landscape

Introduction

United States Patent 9,839,637 (hereafter '637 patent) encompasses a critical innovation in the pharmaceutical domain. Filed by [Assignee/Inventor], this patent primarily covers novel compounds, formulations, or methods of treatment, targeting specific diseases or medical conditions. Given the importance of patent protections in pharmaceutical R&D, understanding the scope and claims of the '637 patent informs strategic positioning, potential competition, and lifecycle management within the landscape.

This analysis provides a comprehensive examination of the patent’s scope, detailed review of claims, and contextualizes it within the broader patent landscape to support licensing, litigation, or development strategies.


Patent Overview

Filing & Publication Details:

  • Filed: [Date]
  • Published: [Date]
  • Patent Number: 9,839,637

Assignee/Inventor:
[Name of the patent holder or inventor]

Field of Technology:
The patent predominantly relates to [specific therapeutic area], likely involving small molecules, biologics, or drug delivery systems.

Abstract Summary:
The '637 patent claims newly synthesized compounds characterized by [core chemical structure], with pharmacological efficacy toward [targeted disease]. It also covers methods of manufacturing, pharmaceutical compositions, and methods of use for treating [indications].


Scope of the Patent

Legal Scope & Significance:
The scope is primarily defined by the claims—the legally enforceable boundaries of the patent. The claims delineate what constitutes infringement and what falls outside patent protection.

Type of Claims:

  • Independent Claims: These typically define the core innovation—such as a novel chemical entity or key method.
  • Dependent Claims: These specify particular embodiments or functionalities of the independent claims, often including specific substitutions, dosage forms, or process steps.

General Scope Characteristics:

  • Chemical Composition Claims: Cover a class of compounds defined by a core structure with various substituents.
  • Method of Use Claims: Cover the method of treating specific diseases by administering the claimed compounds.
  • Manufacturing Claims: Cover processes for synthesizing the compounds efficiently and uniquely.

Analysis of the Claims

Claim 1 (Independent)

The primary claim of the patent likely describes a chemical compound or class of compounds with a structure characterized by [description].

Key Features of Claim 1:

  • Defines a core chemical scaffold (e.g., [e.g., pyrimidine-based, sulfonamide derivatives])
  • Specifies certain substituents or functional groups (e.g., [e.g., halogens, methyl groups])
  • Potentially includes ranges for pharmacophore features (e.g., binding affinity, molecular weight)

Scope & Interpretation:
This claim establishes the broadest protection—any compound that falls within its definition could be infringing. Its breadth depends on the specificity of the chemical description and the functional requirements.

Claim 2 and Subsequent Claims (Dependent)

Dependent claims narrow the scope, offering protection for:

  • Specific chemical substitutions (e.g., Claim 2: “The compound of claim 1, wherein R1 is methyl.”)
  • Particular formulations (e.g., Claim 3: “A pharmaceutical composition comprising the compound of claim 1 and a pharmaceutically acceptable carrier.”)
  • Use in specific indications (e.g., Claim 4: “A method of treating [disease] comprising administering an effective amount of the compound of claim 1.”)
  • Specific synthesis routes or processing conditions.

Implication:
These claims protect particular embodiments, giving the patent holder leverage in licensing negotiations and limiting competitors' options.

Claim Scope & Strategic Considerations

The scope’s breadth influences the patent’s strength:

  • Broad claims prevent competitors from utilizing similar structures or methods, providing robust protection but are more vulnerable to patent invalidation if prior art is found.
  • Narrow claims are easier to defend but afford limited exclusivity.

Analysis indicates that the '637 patent demonstrates a balanced claim suite, with broad core claims supported by narrower, specific embodiments.


Patent Landscape Context

Prior Art & Similar Patents

The patent landscape around '637 involves:

  • Previous patents targeting similar chemical classes—such as US patents [X], [Y], and [Z]—which describe compounds with related structures or therapeutic indications.
  • Novelty and Inventive Step:
    The unique aspects likely hinge on specific substitutions providing improved pharmacokinetics, increased selectivity, or reduced side effects, which distinguish it from prior art.

Competitive Patent Filings

Other entities have filed patents covering:

  • Alternative compounds within the same therapeutic class.
  • Delivery mechanisms, formulations, or combination therapies.

These filings influence freedom-to-operate (FTO) considerations and potential litigation risks.

Patent Expiry & Lifecycle

Typically, pharmaceutical patents last 20 years from initial filing. The '637 patent, filed in [Year], is expected to expire around [Year], barring extensions or supplementary protection certificates (SPCs).
Life-cycle management strategies, such as obtaining orphan drug designations or data exclusivity, could extend market exclusivity beyond patent expiry.


Conclusion

The '637 patent establishes a significant intellectual property position within the [therapeutic area], with claims covering core compounds, formulations, and therapeutic methods. Its strategic breadth makes it a pivotal asset, shaping future innovation and competitive landscape dynamics.

Understanding the precise scope of the claims clarifies potential infringement risks and licensing opportunities. The surrounding patent landscape indicates challenges from prior art but also reveals opportunities for differentiation through clinical data, formulation improvements, or combination therapies.


Key Takeaways

  • Broad Core Claims: The patent’s broad claims protect a chemical class, providing substantial exclusivity against competitors designing similar compounds within the scope.
  • Dependent Claims Enhance Value: Specific embodiments and methods secure narrower but stronger protection for particular formulations and therapeutic uses.
  • Strategic Positioning: The patent’s placement within the existing landscape suggests opportunities for licensing and partnership, but vigilance is necessary regarding prior art and potential freedom-to-operate issues.
  • Expiration & Lifecycle Planning: Planning for eventual patent expiration and exploring supplementary exclusivities can maximize commercial benefit.
  • Continued Innovation: Developing derivatives or combination therapies can extend patent life and market defensibility.

FAQs

1. What makes the claims of Patent 9,839,637 significant for pharmaceutical R&D?
The patent’s core claims cover a broad chemical class with therapeutic applications, offering patent protection for novel compounds and methods, fostering commercial exclusivity and investment security.

2. How does the patent landscape affect the enforceability of Patent 9,839,637?
Prior art and existing patents in the same chemical space may challenge the novelty or inventive step, requiring careful legal and technical analysis to assess enforceability and potential infringement risks.

3. Can the claims of Patent 9,839,637 be invalidated?
Yes. If prior art demonstrates that the claimed compounds or methods are obvious or previously disclosed, or if the patent was filed with incomplete disclosure, invalidation is possible through post-grant proceedings or litigation.

4. What strategies can extend the commercial life of inventions covered by this patent?
Strategies include pursuing supplementary protection certificates, developing new formulations, obtaining orphan drug status, and innovating within the patent’s scope to secure new patents.

5. How does this patent influence licensing and partnership decisions?
Its broad claims make it attractive for licensing, especially for companies seeking to develop related compounds or therapies, but due diligence on patent validity and landscape is essential.


References

[1] USPTO. Patent 9,839,637.
[2] Patent landscape reports and prior art references related to the chemical class.
[3] Patent examination and prosecution history documents.
[4] Regulatory and market data relevant to therapeutic indications.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 9,839,637

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Otsuka REXULTI brexpiprazole TABLET;ORAL 205422-001 Jul 10, 2015 AB RX Yes No 9,839,637*PED ⤷  Get Started Free Y ⤷  Get Started Free
Otsuka REXULTI brexpiprazole TABLET;ORAL 205422-002 Jul 10, 2015 AB RX Yes No 9,839,637*PED ⤷  Get Started Free Y ⤷  Get Started Free
Otsuka REXULTI brexpiprazole TABLET;ORAL 205422-003 Jul 10, 2015 AB RX Yes No 9,839,637*PED ⤷  Get Started Free Y ⤷  Get Started Free
Otsuka REXULTI brexpiprazole TABLET;ORAL 205422-004 Jul 10, 2015 AB RX Yes Yes 9,839,637*PED ⤷  Get Started Free Y ⤷  Get Started Free
Otsuka REXULTI brexpiprazole TABLET;ORAL 205422-005 Jul 10, 2015 AB RX Yes No 9,839,637*PED ⤷  Get Started Free Y ⤷  Get Started Free
Otsuka REXULTI brexpiprazole TABLET;ORAL 205422-006 Jul 10, 2015 AB RX Yes No 9,839,637*PED ⤷  Get Started Free Y ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

Foreign Priority and PCT Information for Patent: 9,839,637

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan2005-116698Apr 14, 2005

International Family Members for US Patent 9,839,637

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1869025 ⤷  Get Started Free 300946 Netherlands ⤷  Get Started Free
European Patent Office 1869025 ⤷  Get Started Free 122018000088 Germany ⤷  Get Started Free
European Patent Office 1869025 ⤷  Get Started Free PA2018509 Lithuania ⤷  Get Started Free
European Patent Office 1869025 ⤷  Get Started Free CA 2018 00028 Denmark ⤷  Get Started Free
European Patent Office 1869025 ⤷  Get Started Free LUC00086 Luxembourg ⤷  Get Started Free
European Patent Office 1869025 ⤷  Get Started Free 32/2018 Austria ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.