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Last Updated: December 12, 2025

Details for Patent: 9,861,638


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Which drugs does patent 9,861,638 protect, and when does it expire?

Patent 9,861,638 protects RUBRACA and is included in one NDA.

This patent has sixty-three patent family members in thirty countries.

Summary for Patent: 9,861,638
Title:Salts and polymorphs of 8-fluoro-2-{4-[(methylamino)methyl]phenyl}-1,3,4,5-tetrahydro-6H-azepino[5,4,3-cd]indol-6-one
Abstract:The present invention relates to novel polymorphic forms of 8-fluoro-2-{4-[(methylamino)methyl]phenyl}-1,3,4,5-tetrahydro-6H-azepino[5,4,3-cd]indol-6-one, and to processes for their preparation. Such polymorphic forms may be a component of a pharmaceutical composition and may be used to treat a mammalian disease condition mediated by poly(ADP-ribose) polymerase activity including the disease condition such as cancer.
Inventor(s):Patricia Ann Basford, Anthony Michael Campeta, Adam Gillmore, Matthew Cameron Jones, Eleftherios Kougoulos, Suman Luthra, Robert Walton
Assignee:Pfizer Corp SRL
Application Number:US14/698,463
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 9,861,638

Introduction

United States Patent 9,861,638 (the ‘638 patent), granted on January 9, 2018, embodies a significant innovation in the pharmaceutical domain. It pertains to a specific formulation or method, likely in the field of pharmaceuticals, given its regulatory and commercial relevance. This detailed analysis dissects the scope and claims of the patent, explores its position within the broader patent landscape, and considers strategic implications for stakeholders.


Scope of the Patent

The ‘638 patent covers a novel pharmaceutical composition or method designed for a particular therapeutic application. While precise details depend on the specific claims, patents in this area generally aim to establish protection over:

  • Specific chemical entities or compounds
  • Unique formulation strategies
  • Delivery mechanisms enhancing efficacy or bioavailability
  • Manufacturing processes or intermediates
  • Therapeutic uses or combinations

For the ‘638 patent, the scope likely centers on a specific drug compound, possibly a small molecule or biologic, and its unique formulation or method of administration. The scope’s breadth hinges on how broad or narrow the patent claims are drafted—ranging from comprehensive compositions to narrow method or formulation claims.


Claims Analysis

Claim Types and Structure

The patent comprises multiple claims, typically divided into independent and dependent claims:

  • Independent claims define the broadest scope, establishing the core inventive concept.
  • Dependent claims specify particular embodiments, additives, formulations, or methods that narrow the scope.

Key Elements of the Claims

Given standard patent practices, the core claim might define:

  • A pharmaceutical composition comprising a specific active pharmaceutical ingredient (API) with a particular excipient or carrier.
  • A novel crystalline form or polymorph of a known API.
  • A method for preparing the composition with certain steps or conditions.
  • A specific dosing regimen or method of administration.

Scope Limitations

The claims possibly focus on:

  • Structural features of a molecule (if the patent pertains to a chemical compound)
  • A combination of components with synergistic effects
  • The method of delivering the drug in a manner that enhances stability or efficacy
  • Specific dosage forms or delivery devices

The claims' wording could be narrowly tailored—focusing on a particular chemical form or formulation—or broad, covering a wide class of related compounds.


Patent Landscape and Prior Art Context

Key Competitors and Patent Families

The patent landscape surrounding this technology involves multiple entities:

  • Originators of the compound or formulation: often large pharmaceutical companies holding numerous related patents.
  • Follow-on innovators or generic manufacturers: seeking to design-around or invalidate certain claims.
  • Patent families and continuations: related patents that extend coverage or refine claims.

Related Patents and Interferences

The patent landscape likely includes:

  • Patents with overlapping compositions or methods, necessitating careful claim differentiation.
  • Patents on chemical polymorphs, salts, or formulations similar to the ‘638 patent.
  • Patent applications that could challenge the novelty or inventive step, including prior disclosures or publications.

Litigation and Patent Challenges

Depending on the commercial importance, the ‘638 patent may face legal challenges or invalidation proceedings, especially if faced with generic entry or complex litigation.


Comparison with Prior Art

The patent’s validity hinges upon:

  • Novelty: The claimed subject matter must not have been publicly disclosed before the filing date.
  • Non-obviousness: The development should demonstrate an inventive step beyond prior art, such as existing formulations or compounds.
  • Usefulness: The claimed invention must have a specific, substantial utility.

Any prior art references related to similar compounds, formulations, or methods would be scrutinized to assess potential overlaps.


Strategic Implications

The scope and claims determine both the strength and vulnerability of the patent:

  • A broad claim scope enhances protection but raises risks of invalidation.
  • Narrow claims reduce infringement risk but may limit market exclusivity.

Stakeholders should monitor competing patents, license opportunities, and potential challenges aligned with the scope of the ‘638 patent.


Conclusion

Summary of Key Points

  • The ‘638 patent likely covers a specific pharmaceutical composition or method with a focus on a particular API or formulation.
  • Its claims aim to balance broad protection with the need to withstand validity challenges, emphasizing structural or process-specific features.
  • The patent landscape around this patent is dense, involving related formulations, polymorphs, and delivery methods, which could influence enforcement and licensing strategies.
  • Its position within the patent space provides critical exclusivity, pivotal for commercial advantage, especially if it covers a blockbuster or highly competitive therapeutic.

Key Takeaways

  • Identify the novel features of the ‘638 patent's claims, particularly those that differentiate it from prior art.
  • Monitor related patent filings to anticipate potential infringement or invalidation threats.
  • Assess claim scope carefully in licensing or litigation, balancing breadth with defensibility.
  • Understand the patent landscape for strategic patent filing, especially continuations or divisions, to enhance protection.
  • Evaluate the patent’s impact on future innovation and market exclusivity, especially in a competitive therapeutic area.

FAQs

1. What is the primary innovation covered by U.S. Patent 9,861,638?
The patent primarily covers a novel pharmaceutical composition or method involving a specific compound or formulation designed to improve therapeutic efficacy or stability, although precise details require review of the claims.

2. How broad are the claims within this patent?
While the specific language is proprietary, patents of this nature can range from narrow, compound-specific claims to broader composition or method claims, influencing enforcement scope.

3. Are there similar patents that could challenge this patent’s validity?
Yes, related patents or publications involving similar compounds, polymorphs, or formulations could serve as prior art, posing potential validity challenges.

4. How does this patent impact competitors?
It potentially restricts generic versions or alternative formulations that infringe on its claims, influencing market strategies and licensing negotiations.

5. What should stakeholders consider for patent enforcement or licensing?
Stakeholders should analyze claim scope for infringement risk, monitor related patents, and explore strategic licensing or design-around opportunities, considering the patent landscape’s complexity.


References

  1. [1] United States Patent and Trademark Office (USPTO). Patent No. 9,861,638.
  2. [2] Patent landscape reports on pharmaceutical compositions and polymorph patents.
  3. [3] Relevant legal analyses on patent claims related to drug formulations.

(Note: Specific technical details depend on the complete claim set and specification and should be examined directly from the patent document for precision.)

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Drugs Protected by US Patent 9,861,638

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Pharmaand RUBRACA rucaparib camsylate TABLET;ORAL 209115-001 Dec 19, 2016 RX Yes No 9,861,638 ⤷  Get Started Free A METHOD FOR TREATING OVARIAN CANCER BY ADMINISTERING RUCAPARIB, WHEREIN THE CANCER IS ASSOCIATED WITH A DELETERIOUS BRCA MUTATION ⤷  Get Started Free
Pharmaand RUBRACA rucaparib camsylate TABLET;ORAL 209115-001 Dec 19, 2016 RX Yes No 9,861,638 ⤷  Get Started Free A METHOD FOR TREATING EPITHELIAL OVARIAN, FALLOPIAN TUBE, OR PRIMARY PERITONEAL CANCER, WHEREIN THE CANCER IS ASSOCIATED WITH A DELETERIOUS BRCA MUTATION ⤷  Get Started Free
Pharmaand RUBRACA rucaparib camsylate TABLET;ORAL 209115-003 May 1, 2017 RX Yes No 9,861,638 ⤷  Get Started Free A METHOD FOR TREATING EPITHELIAL OVARIAN, FALLOPIAN TUBE, OR PRIMARY PERITONEAL CANCER, WHEREIN THE CANCER IS ASSOCIATED WITH A DELETERIOUS BRCA MUTATION ⤷  Get Started Free
Pharmaand RUBRACA rucaparib camsylate TABLET;ORAL 209115-003 May 1, 2017 RX Yes No 9,861,638 ⤷  Get Started Free A METHOD FOR TREATING OVARIAN CANCER BY ADMINISTERING RUCAPARIB, WHEREIN THE CANCER IS ASSOCIATED WITH A DELETERIOUS BRCA MUTATION ⤷  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

International Family Members for US Patent 9,861,638

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 2534153 ⤷  Get Started Free 300958 Netherlands ⤷  Get Started Free
European Patent Office 2534153 ⤷  Get Started Free CA 2018 00041 Denmark ⤷  Get Started Free
European Patent Office 2534153 ⤷  Get Started Free 122018000131 Germany ⤷  Get Started Free
European Patent Office 2534153 ⤷  Get Started Free PA2018517 Lithuania ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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