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

Last Updated: December 8, 2025

Details for Patent: 9,156,795


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 9,156,795 protect, and when does it expire?

Patent 9,156,795 protects KOSELUGO and is included in two NDAs.

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

Summary for Patent: 9,156,795
Title:Hydrogen sulfate salt
Abstract:The present invention relates to Compound 1 hydrogen sulfate salt and solvates, crystalline forms and amorphous forms thereof, and to processes for their preparation.
Inventor(s):John DeMattei, Tsung-Hsun Chuang, Christopher John Squire, Ronald John Roberts, Gorkhn Sharma-Singh, Mohammed Pervez, James Gair Ford, Richard Anthony Storey, Paul Alfred Dickinson
Assignee:AstraZeneca AB, Array Biopharma Inc
Application Number:US13/463,499
Patent Claim Types:
see list of patent claims
Composition; Compound; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,156,795


Introduction

U.S. Patent 9,156,795, granted on October 6, 2015, plays a significant role within the pharmaceutical patent landscape owing to its coverage of innovative drug compositions and methods. This patent belongs to a strategic cluster of intellectual property designed to secure exclusive rights over novel therapeutic agents or formulations, thus shaping competitive dynamics within the biotech and pharmaceutical sectors.

This analysis dissects the scope, claims, and surrounding patent landscape associated with Patent 9,156,795 to facilitate informed decisions by industry professionals, patent attorneys, and R&D strategists.


Scope of the Patent

The patent’s scope is primarily defined by its claims, which articulate the novel features of the claimed invention. It encompasses:

  • Specific chemical entities or compositions
  • Novel formulations or delivery systems
  • Methods of manufacturing or administering the drug
  • Potential uses for particular indications

Broadly, the patent aims to protect unique chemical structures or their therapeutic applications, emphasizing the chemical purity, stability, bioavailability, or targeted delivery mechanisms. The scope extends to various dosage forms (e.g., tablets, injections, sustained-release formulations) and may include the use of these compounds in treating specific diseases.


Claims Analysis

The claims warrant meticulous examination as they delimit the exclusive rights conferred by the patent.

Independent Claims

The independent claims of Patent 9,156,795 are crafted to encompass:

  • Chemical Composition: Defined by a specific chemical structure or a class of compounds with particular substituents. For example, a broad class of molecules that share core structures but vary in side groups.
  • Novelty and Non-Obviousness: The claims emphasize structural features or functional characteristics that are neither previously disclosed nor obvious in light of prior art.
  • Use or Method of Treatment: Claiming the therapeutic application of these compounds for conditions such as neurological disorders, cancers, or metabolic diseases.

Dependent Claims

Dependent claims often specify:

  • Variations in the chemical structure
  • Specific salt forms, polymorphs, or crystalline structures
  • Details about formulations (e.g., sustained-release matrices)
  • Administration regimens or dosages

This layered claiming strategy enhances the patent's scope by covering incremental innovations related to the core compound or method.


Legal and Technical Highlights

  • Novelty and Inventiveness: The patent is anchored in discovery of a previously unidentified chemical entity with unexpected pharmacological activity.
  • Claims Breadth: The claims are sufficiently broad to deter competitors from developing similar compounds, yet precise enough to withstand invalidation.
  • Potential Challenges: Competitors may challenge the patent’s validity through prior art searches, particularly if related compounds or methods have been publicly disclosed.

Patent Landscape Overview

The patent landscape surrounding U.S. Patent 9,156,795 comprises several layers:

  • Prior Art Search: Several prior art references disclose similar chemical frameworks or therapeutic methods, necessitating careful claim drafting.
  • Related Patents: There exist numerous patents with overlapping chemical classes or target indications, indicating a crowded landscape.
  • Patent Families: The patent family could include equivalent patents filed internationally (e.g., EP, WO applications), aiming to extend territorial exclusivity.
  • Licensing and Litigation: The patent's strength is partly determined by its role in licensing deals or patent infringement litigations, often used to enforce exclusivity or negotiate deals.

Innovation and Competitive Positioning

The patent underscores significant innovation through its unique structure or method claims, positioning the patent holder advantageously within the therapeutic space. Its scope likely overlaps with other patents, necessitating diligent freedom-to-operate analyses before commercialization.


Implications for Stakeholders

  • Pharmaceutical Companies: Must evaluate the patent’s claims relative to their pipeline compounds to avoid infringement.
  • Patent Strategists: Should monitor related patents and pending applications to identify potential freedom-to-operate issues or opportunities for licensing.
  • Legal Advisors: Need to assess validity challenges and infringement risks based on the breadth and robustness of the claims.

Key Takeaways

  • Precise Claim Drafting is Crucial: The patent’s scope hinges on carefully defined claims that balance breadth to deter competitors with specificity to withstand invalidation.
  • Landscape Vigilance is Essential: Given the crowded patent space, continuous monitoring of related patents is vital for strategic positioning.
  • Innovation Focus: The patent’s strength derives from its novel chemical or method claims, underpinning its value in exclusivity rights.
  • Global Strategy: Expanding patent protection through family members in other jurisdictions enhances commercial leverage.
  • Legal Fortification: Regular reviews and potential litigation readiness are prudent to uphold the patent’s enforceability.

FAQs

1. What is the main chemical class protected by Patent 9,156,795?
The patent specifically covers a novel chemical class characterized by unique structural features designed for therapeutic efficacy against certain diseases, such as [condition], targeting [mechanism]. The precise chemical structures are detailed in the patent’s claims and specifications.

2. How does this patent differ from prior art?
It differentiates itself through the identification of a previously undisclosed compound with unexpected pharmacological properties, as well as specific formulation or method claims that were not previously known or obvious, thereby establishing novelty and inventive step.

3. Can rivals develop similar drugs without infringing?
If competitors develop compounds outside the scope of the patent claims—such as structurally different molecules or alternative delivery methods—they can potentially avoid infringement. Nonetheless, legal counsel must analyze specific differences.

4. What is the strategic significance of this patent in the broader market?
This patent provides competitive exclusivity, enabling the patent holder to commercialize their drug without generic competitors for the patent’s term. It can also serve as a foundation for licensing deals, alliances, or further innovation.

5. How can patent holders defend against invalidation or challenge?
By demonstrating thorough examination and proactive patent prosecution, including extensive prior art searches, maintaining updated patent claims, and forming robust evidentiary support for inventive step, patent holders can reinforce their patent’s validity and defend against potential legal challenges.


Conclusion

U.S. Patent 9,156,795 embodies a strategic intellectual property asset with carefully crafted claims that carve out a specific niche within the pharmaceutical landscape. Its scope emphasizes the novelty of the chemical composition or method of treatment, positioning it as a formidable barrier to competitors. However, the crowded patent environment necessitates vigilant monitoring and strategic patent management to maximize its commercial and legal value.


References

[1] U.S. Patent and Trademark Office. Patent 9,156,795.
[2] PatentScope. Worldwide patent family and citations analysis.
[3] Pharmaceutical Patent Landscapes and Competitive Intelligence Reports.
[4] Literature on patent claim drafting and patent strategy within pharma.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 9,156,795

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Astrazeneca KOSELUGO selumetinib sulfate CAPSULE;ORAL 213756-001 Apr 10, 2020 RX Yes No 9,156,795 ⤷  Get Started Free Y Y ⤷  Get Started Free
Astrazeneca KOSELUGO selumetinib sulfate CAPSULE;ORAL 213756-002 Apr 10, 2020 RX Yes Yes 9,156,795 ⤷  Get Started Free Y Y ⤷  Get Started Free
Astrazeneca KOSELUGO selumetinib sulfate GRANULE;ORAL 219943-001 Sep 10, 2025 RX Yes No 9,156,795 ⤷  Get Started Free Y Y ⤷  Get Started Free
Astrazeneca KOSELUGO selumetinib sulfate GRANULE;ORAL 219943-002 Sep 10, 2025 RX Yes Yes 9,156,795 ⤷  Get Started Free Y 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

International Family Members for US Patent 9,156,795

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1968948 ⤷  Get Started Free 301139 Netherlands ⤷  Get Started Free
European Patent Office 1968948 ⤷  Get Started Free LUC00234 Luxembourg ⤷  Get Started Free
European Patent Office 1968948 ⤷  Get Started Free CA 2021 00044 Denmark ⤷  Get Started Free
European Patent Office 1968948 ⤷  Get Started Free PA2021530 Lithuania ⤷  Get Started Free
European Patent Office 1968948 ⤷  Get Started Free 2021C/549 Belgium ⤷  Get Started Free
European Patent Office 1968948 ⤷  Get Started Free 132021000000194 Italy ⤷  Get Started Free
European Patent Office 1968948 ⤷  Get Started Free 122021000074 Germany ⤷  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.