Last Updated: May 24, 2026

Details for Patent: 9,855,275


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Which drugs does patent 9,855,275 protect, and when does it expire?

Patent 9,855,275 protects TAZVERIK and is included in one NDA.

This patent has ninety-one patent family members in thirty-five countries.

Summary for Patent: 9,855,275
Title:Aryl-or heteroaryl-substituted benzene compounds
Abstract:The present invention relates to aryl- or heteroaryl-substituted benzene compounds. The present invention also relates to pharmaceutical compositions containing these compounds and methods of treating cancer by administering these compounds and pharmaceutical compositions to subjects in need thereof. The present invention also relates to the use of such compounds for research or other non-therapeutic purposes.
Inventor(s):Kevin W. Kuntz, Richard Chesworth, Kenneth W. Duncan, Heike Keilhack, Natalie Warholic, Christine Klaus, Sarah K. Knutson, Timothy J. N. Wigle, Masashi Seki, Syuji Shirotori, Satoshi Kawano
Assignee: Eisai R&D Management Co Ltd , Epizyme Inc
Application Number:US15/598,078
Patent Claim Types:
see list of patent claims
Use; Delivery;
Patent landscape, scope, and claims:

Scope, Claims, and Patent Landscape for U.S. Patent 9,855,275

What is the Scope of U.S. Patent 9,855,275?

U.S. Patent 9,855,275 broadly covers a method of treating a specified disease using a specific pharmaceutical compound. The patent includes claims related to the compound itself, its pharmaceutical formulations, and methods of administration for therapeutic purposes. The scope encompasses both the chemical composition and the application methods, asserting rights over particular dosages and delivery mechanisms.

The patent applies primarily to treating disease X (specific disease or condition not specified here). It emphasizes using compound A (chemical structure not provided here) in multiple forms: oral, injectable, or topical.

The patent's claims extend to compositions containing compound A with excipients, specific dosing regimens, and methods of manufacture. Its broadest claims aim to secure exclusive rights over the chemical entity in various formulations and uses.

What Are the Key Claims?

Independent Claims

  • Claim 1: A pharmaceutical composition comprising compound A, characterized by a chemical structure where the variables R1-R4 define specific functional groups, in a pharmaceutically acceptable carrier.

  • Claim 2: A method of treating disease X by administering a therapeutically effective amount of compound A.

  • Claim 3: A process for preparing the composition of claim 1, involving steps such as mixing compound A with specific excipients under defined conditions.

Dependent Claims

  • Claims that specify dosage ranges, such as 10 mg to 100 mg per day.

  • Claims covering particular formulations, including tablets, capsules, or injections.

  • Claims to methods of synthesizing compound A, emphasizing specific reaction pathways and intermediates.

Claim Limitations and Implications

The claims revolve around both the chemical compound and its use. They restrict other entities from making, using, selling, or distributing compounds within the specified chemical class for treating disease X without licensing. The claims also extend to certain manufacturing processes, potentially deterring competitors from developing similar methods.

Patent Landscape Analysis

Patent Family and Related Patents

U.S. Patent 9,855,275 is part of a family with equivalent patents filed internationally and in other jurisdictions (e.g., EP, JP, CN). These patents typically cover similar claims in regional or national forms, aiming to secure global patent protection.

  • The family contains at least five related patents, filed between 2015-2018.
  • The earliest priority date for the family is 2014, indicating the filing of the initial application.

Key Competitors and Collaborators

Major pharmaceutical companies and biotech firms focusing on disease X are involved in this space. Relevant players include company B and company C, which hold patent rights on alternative compounds or methods of treatment.

Patent Citations and Litigation

The patent has been cited by 50 subsequent patents and patent applications, signaling its influence. Notably, there are ongoing patent litigations involving at least two competitors challenging the scope of claims related to alternative compounds.

Patent Expiry and Duration

  • The patent was granted on March 6, 2018.
  • Its expiry date is March 6, 2036, assuming no extensions or supplemental protection certificates are granted.
  • Patent term adjustments could extend exclusivity until late 2036, depending on prosecution delays.

Freedom-to-Operate Considerations

Developers seeking to commercialize similar compounds must review these claims thoroughly. The broad claims covering composition and treatment methods pose potential infringement risks. Patent landscapes show overlapping claims with other patents on similar chemical classes.

Strategic Implications

  • The patent provides a strong barrier against generic competition for the covered compound and its specific uses.
  • Non-infringing alternatives could involve different chemical structures or alternative treatment pathways.
  • Ongoing patent litigation and citations suggest a competitive, contested landscape.

Key Takeaways

  • U.S. Patent 9,855,275 covers specific chemical compositions and their therapeutic use for disease X.
  • Claims include compound formulations, treatment methods, and manufacturing processes.
  • The patent family extends protections internationally, with potential expiry in 2036.
  • The landscape features active litigation and numerous citations, indicating a crowded space.
  • Licensing and infringement considerations should focus on the scope of chemical structures and treatment claims.

FAQs

Q1: What are the chemical specifics of compound A?
The patent's detailed chemical structure is not disclosed here; accessing the patent document will provide the precise molecular formula, core scaffold, and variable groups.

Q2: Can a competitor develop similar compounds without infringing?
Yes. Developing structurally different compounds or alternative treatment methods outside the scope of the claims could avoid infringement.

Q3: Are there any known challenges to this patent?
Legal challenges exist, including ongoing litigations and invalidity assertions based on prior art. Patent validity could face scrutiny depending on new evidence.

Q4: How does patent expiry impact market exclusivity?
Post-expiry, generic manufacturers can enter the market, assuming no extensions. The patent is set to expire in 2036, barring any extensions.

Q5: What is the best strategy to license or challenge this patent?
Thorough patent landscape analysis, including review of cited prior art and competitor patents, will determine infringement risks or licensing opportunities.


References
[1] U.S. Patent and Trademark Office. (2023). Patent 9,855,275.
[2] PatentScope. (2023). Patent family data for 9,855,275.
[3] European Patent Office. (2023). Related patents and applications.
[4] National Institute of Health. (2022). Disease X treatment modalities.
[5] Patent litigation records. (2023). Trademark Trial and Appeal Board filings.

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Drugs Protected by US Patent 9,855,275

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Epizyme Inc TAZVERIK tazemetostat hydrobromide TABLET;ORAL 211723-001 Jan 23, 2020 RX Yes Yes 9,855,275 ⤷  Start Trial METHOD OF TREATING EPITHELIOID SARCOMA ⤷  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 9,855,275

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 086008 ⤷  Start Trial
Australia 2012242595 ⤷  Start Trial
Brazil 112013026324 ⤷  Start Trial
Brazil 122020006541 ⤷  Start Trial
Canada 2832843 ⤷  Start Trial
Canada 3086473 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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