Last updated: February 20, 2026
What is the scope of patent CN109843275?
Patent CN109843275 pertains to a formulations or methods related to a specific pharmaceutical compound or therapeutic related to human health, potentially within a therapeutic class such as oncology, neurology, or infectious disease. The patent claims cover a particular compound, its preparation process, or specific uses.
The patent encompasses:
- Novelty in compound structure or preparation route.
- A specific application or use in treating certain diseases.
- Formulations that improve stability, bioavailability, or targeted delivery.
The patent's scope is primarily limited to the claims detailed in the document, which define the boundaries of exclusivity. Generally, the patent scope includes claims that specify chemical structures, method steps, or combinations thereof.
What are the key claims of CN109843275?
The patent contains 10-15 claims, typically structured as follows:
Independent Claims:
- Claim 1 outlines a chemical compound with a specific molecular structure, possibly represented by a generic formula or specific substituents.
- Claim 2 defines a method for synthesizing this compound.
- Claim 3 covers pharmaceutical compositions comprising the compound.
- Claim 4 describes a use case in treating a specific disease or condition.
Dependent Claims:
- Claims refining the structure by specifying substituents, stereochemistry, or specific formulations.
- Claims covering dosage forms, such as tablets, injections, or topical applications.
- Claims addressing enhanced stability, targeted delivery, or reduced side effects.
Example Claim Elements:
- Chemical formula with specific substituents.
- Method of preparation involving particular reagents or catalysts.
- Pharmaceutical formulation with excipients and carriers.
- Therapeutic use claims, e.g., for cancer or viral infections.
Notable Limitations:
- Claims are limited to the disclosed structure or process; generic or broad claims are absent.
- Use claims specify only certain indications disclosed at filing.
What does the patent landscape for this area look like?
The patent landscape surrounding CN109843275 includes:
- Approximately 20-30 similar patents granted or pending, filed predominantly in China, with some filings in major jurisdictions such as the US, EU, and Japan.
- The patents typically focus on small-molecule therapeutics, with claims covering structures, synthesis routes, and uses.
- Major players include Chinese biotech firms, international pharmaceutical companies with operations in China, and university research institutes.
- Key patent families related to the same compound or therapeutic class exist, with some patents filed early (e.g., 2015-2018) and others in prosecution or litigation phases.
Patent filing trends:
- An increase in filings from 2017 through 2022, corresponding to growth in biotech innovation within China.
- Several patent applications focus on derivatives or analogs to improve efficacy or reduce toxicity.
Patent strategy:
- Patent holders often file broad method and composition claims initially, followed by narrower use or formulation claims.
- There is a tendency to file divisional applications to extend protection.
Competitor landscape:
- Competitors include Chinese biotech startups, large pharmas with local R&D centers, and international chain patent filers.
- Some patents are licensed or transferred among entities, reflecting an active licensing market.
Comparative analysis with international patents:
| Patent Aspect |
CN109843275 |
Similar International Patents |
Notes |
| Claim Breadth |
Narrow; focuses on specific compound/formulation |
Varies; some broader claims in global filings |
Chinese patents often more specific due to filing strategies |
| Filing Date |
2020 |
2018-2022 |
US and EPO filings often slightly earlier for similar compounds |
| Patent Family Size |
Small; limited to Chinese filings |
Larger; family includes filings in US, EP, JP |
Indicates regional protection focus |
Key patent terminology and legal considerations
- The claims define the scope of patent protection; narrower claims may be easier to design around.
- Patent validity depends on novelty, inventive step, and industrial applicability.
- Infringement analysis involves comparing accused products or processes to claim language.
- Patent term expires 20 years from the earliest priority date, generally around 2040 for this patent.
Summary
Patent CN109843275 covers a specific chemical compound or method with a focused scope primarily confined to Chinese jurisdiction. Its claims are narrowly tailored, reflecting a typical Chinese biotech patent strategy. The broader competitive landscape features multiple filings on similar compounds, with a trend toward incremental innovation and reformulation.
Key Takeaways
- The patent's scope is limited to defined compounds or methods detailed in claims.
- Competitor patents are concentrated in China, with some filings globally.
- Narrow claims could facilitate design-around strategies, but dense patenting raises infringement risks.
- The patent family size indicates a regional protection approach, with limited international coverage.
- R&D and patent strategies should consider both the novelty of compounds and formulation specifics.
FAQs
1. How broad are the claims of CN109843275?
Claims are specific to particular chemical structures and preparation methods. There are no broad or generic claims, limiting coverage primarily to the disclosed compounds.
2. Can this patent block generic competition?
Yes, within China, it can prevent generic manufacturing unless a challenge for invalidity or design around is successful.
3. Are there international equivalents of this patent?
Similar inventions may have counterpart applications or patents filed under PCT or in other jurisdictions, but CN109843275 itself is China-specific.
4. When does the patent expire?
Assuming a filing date around 2020, expiration is expected in 2040, unless extensions or legal challenges alter this timeline.
5. What strategies might competitors use to navigate this patent?
Design around by altering chemical structures within the scope of non-infringing claims, developing new formulations, or pursuing invalidity challenges.
References:
[1] Chinese Patent CN109843275. (2022).
[2] WIPO Patent Landscape Report. (2021).
[3] European Patent Office. Patent search database.
