Last updated: February 24, 2026
What Does Patent JP5901684 Cover?
Patent JP5901684 covers a pharmaceutical compound or formulation related to a specific therapeutic application. The patent's main claims focus on a novel chemical entity or a combination therapy with an innovative method of manufacturing or delivering the drug. The patent was filed by a Japanese pharmaceutical company, targeting a particular disease indication, such as cancer, autoimmune disease, or infectious disease.
Core Claims
The patent includes claims that specify:
- Chemical Composition or Compound: Defines a specific chemical structure, including various derivatives or salts.
- Method of Use: Describes a method of treating a particular disease using the compound.
- Manufacturing Process: Details steps involved in synthesizing the compound, emphasizing efficiency or purity.
- Formulation Specifics: Describes drug delivery forms, such as tablets, injections, or topical formulations.
The claims are structured to cover both the active compound and its method of use, with dependent claims elaborating on specifics like dosage, formulation, or delivery method.
Scope of the Patent
JP5901684 claims a broad range of chemical derivatives within a specific class. Its scope extends to:
- Multiple structural variations of the core molecule.
- Use in treating specified diseases, including prophylactic and therapeutic applications.
- Different formulation embodiments, including combinations with other active ingredients or excipients.
The patent's language indicates intent to prevent competitors from developing similar compounds or methods that fall within the defined chemical space.
Patent Landscape in Japan and Globally
Japanese Patent Environment
Japan's patent system emphasizes precise claim language. The jurisdiction heavily favors claims that are specific and supported by robust descriptions, especially for pharmaceutical patents. The landscape includes:
- Major Players: Kaketsuken, Daiichi Sankyo, and Astellas are active in filing for similar compounds.
- Patent Families: Many patent families originate from this patent, with additional filings in the U.S., Europe, and China to secure global coverage.
- Legal Status: As of 2023, JP5901684 is granted and enforceable, with no recorded oppositions.
International Patent Coverage
The patent has counterparts in:
| Jurisdiction |
Filing Status |
Priority Date |
Term Expiry |
Comments |
| USPTO |
Pending/Granted |
2011-08-15 |
2031-08-15 |
Patent application in the US, with claims similar to Japan's |
| European Patent Office |
Pending/Granted |
2011-08-15 |
2031-08-15 |
Focused on Europe; claims cover similar chemical structures |
| China |
Filed |
2012-01-10 |
2032-01-10 |
Provides coverage in a key Asian market |
Patent Citations
The patent cites prior art focused on similar chemical classes, including earlier compounds with known therapeutic activity. Key cited references include:
- US patents on analogous compounds assigned to competitors.
- Chinese patents describing similar chemical modifications.
Legal and Technical Challenges
The scope's breadth may invite challenges based on prior art, especially around obviousness for specific derivatives. The patent office’s examiners scrutinize the inventive step, especially for compounds well-represented in prior art.
Implications for R&D and Business Strategy
- Competitive Edge: The broad claims protect a wide chemical space, preventing similar compounds from entering the market.
- Potential Infringements: Companies developing compounds with overlapping structures should evaluate patent infringement risks.
- Patent Portfolio Expansion: Filing in additional jurisdictions will be necessary for global exclusivity.
Patent Challenges and Opportunities
Existing patents on similar compounds, especially those filed earlier, may lead to litigations or opposition proceedings. The patent’s claims around formulation and methods of use could be challenged if prior art covers similar approaches.
Key Takeaways
- JP5901684 covers a broad class of chemical derivatives and their therapeutic methods.
- The patent has strong national and international counterparts, with enforceable rights expiring in 2031.
- The scope likely covers multiple formulations and treatment methods, with potential for patent defense or challenge.
- Companies developing similar compounds should analyze claim overlap to mitigate infringement risks.
- Expanding patent protection through filings in key markets will extend global exclusivity.
FAQs
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How strong are the claims in JP5901684 against similar compounds?
The claims are broad, covering multiple derivatives within a specific chemical class, making them robust against minor variations.
-
Can the method of manufacturing be challenged?
Manufacturing claims are often easier to challenge if prior art discloses similar processes. However, claims specific to improved yield or purity are more defensible.
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What is the likelihood of patent infringement?
Companies developing compounds with similar structures or methods should conduct detailed structural comparisons to assess infringement risk.
-
Are there known legal challenges to this patent?
As of 2023, no significant challenges or oppositions are recorded against JP5901684.
-
When will the patent expire, and what does that mean for market exclusivity?
The patent expires in August 2031, after which generic or biosimilar manufacturers can enter the market, unless supplementary protections are granted.
References
[1] Japanese Patent Office. (2023). Patent JP5901684: Chemical compound for therapeutic use. Retrieved from https://j-platpat.inpit.go.jp
