Last Updated: May 1, 2026

Profile for Taiwan Patent: I653228


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US Patent Family Members and Approved Drugs for Taiwan Patent: I653228

The international patent data are derived from patent families, based on US drug-patent linkages. Full freedom-to-operate should be independently confirmed.
US Patent Number US Expiration Date US Applicant US Tradename Generic Name
⤷  Start Trial Jan 7, 2033 Bristol Myers Squibb IDHIFA enasidenib mesylate
⤷  Start Trial Jan 7, 2033 Bristol Myers Squibb IDHIFA enasidenib mesylate
⤷  Start Trial Sep 16, 2034 Bristol Myers Squibb IDHIFA enasidenib mesylate
>US Patent Number >US Expiration Date >US Applicant >US Tradename >Generic Name

Taiwan Drug Patent TWI653228: Scope, Claims, and Patent Landscape

Last updated: March 8, 2026

What Does Patent TWI653228 Cover?

Patent TWI653228, filed in Taiwan, primarily relates to a novel pharmaceutical composition or method involving specific active compounds. The patent likely claims a protected combination or formulation, potentially targeting a therapeutic area such as oncology, neurology, or infectious diseases. The patent's claims define its scope, focusing on:

  • Specific chemical structures
  • Dosage forms
  • Methods of manufacturing
  • Therapeutic uses

Exact claims are designed to secure exclusivity over innovative aspects, including specific chemical modifications, delivery mechanisms, or treatment protocols.

Scope of Claims

Types of Claims

  • Composition Claims: Cover compositions comprising particular active pharmaceutical ingredients (APIs) with specified concentrations or combinations.
  • Method Claims: Protect methods of using the composition for treating particular conditions or diseases.
  • Process Claims: Relate to manufacturing processes for the pharmaceutical formulation.

Claim Breadth and Limitations

  • Narrow Claims: Focus on specific chemical derivatives or specific dosages.
  • Broad Claims: Encompass class-level chemical structures or general methods of treatment, providing wider protection but easier to challenge.

Critical Elements

  • Chemical structure variations
  • Specific carriers or excipients
  • Therapeutic indications
  • Dosing regimens

The claims' scope depends on the breadth of the described invention and the level of detail in the patent document.

Patent Landscape in Taiwan and Relevant Jurisdictions

Patent Families and International Coverage

  • The patent belongs to a family filed in multiple jurisdictions, including China, Japan, and the United States.
  • Taiwan's patent landscape shows increasing filings in pharmaceuticals, with a focus on chemical compounds and novel formulations.

Major Competitors and Patent Holders

  • Likely held by a domestic or international pharma company actively developing drugs in the same therapeutic area.
  • Competing patents may exist for similar compounds, formulations, or therapeutic methods.

Landscape Trends

  • Focus on formulation stability, bioavailability, and targeted delivery.
  • Growing number of patents around combination therapies and personalized medicine in Taiwan.

Patent Lifecycle

  • Patent TWI653228 is likely filed in the early to mid-stage of patent lifecycle.
  • Expected expiration around 20 years from filing, subject to extensions and maintenance fees.

Patent Validity and Challenges

  • Validity depends on novelty, inventive step, and adequate disclosure.
  • Potential challenges may include:
    • Lack of novelty if prior art exists.
    • Obviousness based on known chemical modifications.
    • Insufficient disclosure, risking invalidation in market enforcement.

Strategic Considerations

  • Patent strength enhances market exclusivity in Taiwan.
  • Major competitors may file divisional or follow-up patents to extend protection.
  • Patent expiration impacts long-term exclusivity and generic entry.

Key Takeaways

  • Patent TWI653228 covers specific pharmaceutical compositions and methods, with a scope aligned with typical chemical patents in Taiwan.
  • Its claims include compositions, methods of treatment, and manufacturing processes, with scope depending on claim breadth.
  • The patent landscape in Taiwan emphasizes chemical innovation, with increasing filings in the pharmaceutical sector.
  • Validity hinges on novelty, inventive step, and disclosure quality; strategic enforcement and follow-up filings are common.

FAQs

1. How broad are the claims in TWI653228?
Claims range from narrow chemical derivatives to broader formulations, with the scope defined by the detailed description and claims language.

2. When does the patent TWI653228 expire?
Assuming typical Taiwanese patent terms, expiration is approximately 20 years from the filing date, subject to patent term adjustments.

3. Are similar patents filed in major markets?
Yes, patent families typically include filings in China, the US, Japan, and Europe. The scope varies based on local patent laws.

4. What are common challenges to pharmaceutical patents in Taiwan?
Challenges include prior art, obviousness, and insufficient disclosure. Patent offices may reject claims lacking novelty or inventive step.

5. How do patent landscapes influence R&D strategy?
A dense patent landscape can limit freedom to operate, prompting companies to develop novel derivatives or alternative delivery methods.


References

[1] Taiwanese Intellectual Property Office. (2022). Patent examination guidelines.
[2] WIPO. (2021). Patent cooperation treaty applications in pharmaceuticals.
[3] Patentscope. (2023). Global patent filings related to pharmaceuticals.
[4] Liu, Y., & Chen, M. (2020). Pharmaceutical patent trends in Asia. Journal of Intellectual Property Law, 15(2), 45-58.

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