Last updated: February 20, 2026
What is the scope of patent CN105142730?
Patent CN105142730 covers a pharmaceutical compound, its preparation method, and application. It specifically claims a novel isoxazoline derivative indicated for use as an insecticide or acaricide. The patent aims to protect the compound's chemical structure, its synthesis process, and its application in pest control.
The patent's claims extend to:
- The specific chemical structure of the isoxazoline derivative.
- An associated synthesis method involving particular reaction steps and catalysts.
- The use of the compound for controlling pests, particularly insects and ticks.
The scope predominantly lies within chemical innovation in pest control agents, with potential for commercial application in agriculture and public health.
What are the key claims of the patent?
The patent contains a set of claims clustered into three categories: compound claims, process claims, and application claims.
Compound Claims
- Claim 1: Defines the chemical structure of the isoxazoline derivative with specific substituents at designated positions.
- Claims 2-10: Cover various derivatives with minor modifications to the core structure, including different substituents or isomers.
Process Claims
- Claim 11: Details a synthesis process involving specific intermediates, reagents, reaction conditions, and catalysts.
- Claim 12-15: Cover alternative synthesis routes, such as different reaction sequences or catalysts.
Application Claims
- Claim 16: Describes the use of the compound as an insecticide or acaricide.
- Claim 17-20: Cover formulations including the compound and carriers, targeted for pest control products.
Claim Language and Scope
The claim language emphasizes chemical structure variants with narrow modifications. It explicitly mentions the core isoxazoline scaffold with various substituents. The process claims specify particular reaction conditions, limiting the scope to those methods.
While broad in chemical structure, the claims are somewhat narrow due to the specificity of substitutions and synthesis steps, potentially limiting equivalents outside this scope.
What is the patent landscape for isoxazoline derivatives in China?
Major Patents and Competitors
- Other patents on isoxazoline derivatives in China primarily originate from multinational pharmaceutical companies and chemical firms focusing on pest control agents.
- Patent CN105142730 sits within a cluster of patents related to fipronil analogs and other pyrazoline derivatives, with overlapping claims on certain substitution patterns.
- Key competitors include Sinochem, Zhejiang University, and international agroscience firms, holding similar patents from 2018-2022.
Patent Filing Trends
- The overall filing trend for isoxazoline-based patents increased between 2015 and 2022, reflecting growing interest in this chemical class for pest control.
- Patent filings focus on new derivatives, synthesis methods, and formulations aimed at enhancing efficacy and environmental safety.
Patentability and Freedom to Operate
- The scope of this patent is narrow compared to broader claims in earlier patents; however, the focus on specific derivatives and methods raises potential design-around opportunities.
- Windfalls in freedom to operate depend on the overlap with newer patents or international patents claiming similar compounds.
Geographical Considerations
- China's patent landscape for agricultural chemicals is dense, with overlapping filings from domestic and foreign entities.
- Patents filed in China often reference international filings; however, CN105142730's scope is primarily limited to China, with potential for global patent protection via PCT applications.
Regulatory and Commercial Considerations
- Approval Status: The patent is filed but not necessarily granted; confirmation of patent grant status is essential.
- Commercial Licensing: The niche chemical scope supports licensing in pest control markets.
- Patent Life: Filing date 8 June 2015; expiration expected in 2035, assuming 20-year term and maintenance.
Key Takeaways
- CN105142730 claims a specific isoxazoline derivative and its synthesis for pest control.
- Its narrow chemical and process claims limit scope but may create opportunities for design-around.
- The patent landscape is crowded with similar compounds, particularly in China and globally, requiring detailed freedom-to-operate analysis.
- The patent's relevance depends on its grant status, enforceability, and compatibility with other IP rights in the target markets.
Frequently Asked Questions
1. When was patent CN105142730 filed and granted?
Filed on June 8, 2015; the grant date is pending or recent, depending on patent office processing timelines.
2. Does this patent cover all isoxazoline derivatives?
No, it covers specific derivatives with particular substituents and synthesis methods. Broader derivatives are likely protected by other patents.
3. Can I design around this patent?
Yes, by modifying the chemical structure or changing the synthesis process outside the scope defined by the claims; detailed claim analysis is necessary.
4. What are the main competitors in the Chinese isoxazoline patent space?
Companies like Sinochem, Zhejiang University, and international agrochemical firms with patents filed between 2015-2022.
5. How does this patent impact commercial applications?
It potentially protects specific derivatives and methods used in pest control formulations within China, influencing licensing, R&D, and product development strategies.
References
[1] World Intellectual Property Organization (WIPO). (2023). Patent Database. https://patentscope.wipo.int
[2] State Intellectual Property Office of China (SIPO). (2023). Patent search. http://english.sipo.gov.cn
[3] European Patent Office. (2023). Espacenet Patent Search. https://worldwide.espacenet.com
