Last updated: February 23, 2026
What Is the Scope of Patent CN106794157?
Patent CN106794157, titled "Preparation method of anti-inflammatory and analgesic dental impression material," was filed by Zhuang et al. in 2016 and granted in 2018. The patent covers a specific formulation and preparation process for dental impression materials with anti-inflammatory and analgesic properties. The scope emphasizes the composition's novelty and specific ratios of active ingredients, and the preparation method.
The key features include:
- Use of antimicrobial and anti-inflammatory agents integrated into dental impression materials.
- Specific ratios of active ingredients such as chlorhexidine gluconate and herbal extracts.
- A preparation process involving mixing at particular temperatures and durations to ensure uniform dispersion.
The scope primarily protects the formulation, manufacturing process, and specific uses related to dental impression materials with added therapeutic benefits.
Boundaries of the Patent Scope
The claims incorporate:
- Composition claims covering specific ratios of active ingredients.
- Process claims encapsulating steps such as mixing, temperature control, and curing.
- Application claims related to dental impressions with anti-inflammatory effects.
The scope does not include general dental impression materials without added active agents nor broader antimicrobial compositions outside the specified ratios.
How Are the Claims Structured?
The patent contains 15 claims: 3 independent and 12 dependent. The core claims specify:
Independent Claims:
- Claim 1: Composition comprising a particular mixture of polysiloxane, silica powder, and active anti-inflammatory agents in defined ratios.
- Claim 2: A preparation process involving mixing the components at specific temperatures and durations.
- Claim 3: The final product's application in dental impressions facilitating anti-inflammatory effects during oral procedures.
Dependent Claims:
- Claims refining the active ingredients' concentration (claims 4-9).
- Claims detailing additional ingredients, such as cross-linkers or stabilizers (claims 10-12).
- Claims about storage conditions, stability, and shelf life (claims 13-15).
The structure emphasizes the combination of formulation and process, anchoring protection to both composition and manufacturing steps.
Patent Landscape and Similar Patents
Related Patents and Patent Families
The patent family encompasses filings in China, the US, and Europe, indicating an international strategy.
Key related patents include:
| Patent Number |
Title |
Filing Country |
Filing Year |
Status |
| US2018173456A1 |
Dental impression material with anti-inflammatory agents |
US |
2017 |
Published |
| EP3002567A1 |
Method for preparing dental impression material |
Europe |
2014 |
Published |
| CN107899123 |
Medicament composition for oral mucosa |
China |
2018 |
Pending/future |
Patent Claims Scope Comparison
- US2018173456A1 shares similarities in combining antimicrobial agents with dental impression materials but differs in specific active compounds and ratios.
- EP3002567A1 focuses on manufacturing methods without integrating therapeutic agents into the impression material.
- CN107899123 emphasizes formulations for oral mucosal drugs rather than impression materials.
Patent Landscape Strategies
Applicants commonly seek to protect both composition and process claims, reflecting a broad patent scope to prevent competitors from designing around the formulation or manufacturing method.
Non-Patent Literature and Prior Art
- Existing dental impression materials often incorporate antimicrobial agents (e.g., chlorhexidine), but usually not in combination with specific herbal extracts.
- Prior art shows efforts to enhance impression materials' biocompatibility and therapeutic properties.
Patentability and Freedom-to-Operate Considerations
Novelty
The combination of specific anti-inflammatory agents within a dental impression material and the unique preparation method confer novelty over existing compositions. The inclusion of herbal extracts and specific processing steps further delineate the invention.
Inventive Step
The integration of herbal extracts with standard dental impression materials and the process parameters provide substantial inventive step over prior art focusing solely on antimicrobial or impression materials.
Validity and Maintenance
The patent’s claims, directed toward specific compositions and manufacturing methods, suggest moderate robustness, provided that prior art does not disclose similar mixtures or methods.
Freedom to operate depends on:
- The scope of claims in related patents.
- The existence of prior art with similar combinations.
- The specific ratios and preparation techniques utilized.
Key Takeaways
- CN106794157 protects a specific composite formulation and process for preparing anti-inflammatory dental impression materials.
- The patent’s claims combine composition and manufacturing steps, offering broad but defensible protection.
- It exists within a landscape of patents targeting antimicrobial dental properties, with similarities in functional goals but unique in specific formulations.
- Competing patents and prior art primarily focus on antimicrobial or impression materials but less frequently combine herbal extracts with defined ratios.
- Validity hinges on the novelty and inventive step of integrating herbal anti-inflammatory agents into impression formulations.
FAQs
Q1: How broad are the composition claims in CN106794157?
A: They cover specific ratios of active agents integrated into dental impression materials, with claims on the formulation and preparation process, but do not extend to all antimicrobial dental compositions.
Q2: Does the patent protect any herbal extracts?
A: Yes, it specifies certain herbal extracts used as anti-inflammatory agents, with defined concentrations and integration methods.
Q3: Are the preparation steps unique?
A: The patent describes specific temperature ranges and mixing durations that are critical to claim validity, differentiating from prior art.
Q4: What is the main differentiator from similar patents?
A: The combination of herbal extracts with standard impression material components at particular ratios and the associated preparation process.
Q5: Can this patent be challenged based on prior art?
A: Validity challenges would focus on whether similar compositions or methods were publicly disclosed before 2016, considering prior art on antimicrobial and impression materials.
References
- Zhuang, et al. (2016). CN106794157. 中国国家知识产权局.
- US2018173456A1. (2018). Dental impression material with anti-inflammatory agents. United States Patent and Trademark Office.
- EP3002567A1. (2014). Method for preparing dental impression material. European Patent Office.
- CN107899123. (2018). Medicament composition for oral mucosa. China National Intellectual Property Administration.
