Search Report Standards for Patentability Search Reports
Introduction
Search report standards make patentability conclusions understandable and defensible. A Patentability Search Report whose sole conclusion reads “Grant Prospects are favorable” — that is a poor Patentability Search Report.
A Patentability Search Report that enables the reader to clearly understand “why this conclusion was reached, on what evidence it is based, and what uncertainties remain” — that is a professional Patentability Search Report.
The professionalism of a report affects not only the quality of internal decision-making; in subsequent examination responses or patent invalidation proceedings that may arise, a clearly documented Patentability Search Report is itself a valuable information asset. This article provides professional search report standards for Patentability Search Reports.
Search Report Standards: What a Good Report Looks Like
Standard 1: Search Process Must Be Fully Transparent
A poor report:
“A comprehensive patent search has been conducted worldwide.”
A good report:
- Search Date: March 15, 2024
- Databases: Espacenet (Worldwide), PATENTSCOPE (WIPO Global Patent Search), Google Patents, Google Scholar (NPL)
- Search Keywords: See Appendix 1 — Keyword Matrix (covering Chinese and English expressions as well as broader and narrower concepts)
- Classification Codes: IPC H01M 10/0525 (lithium-ion batteries), H01M 4/131 (positive electrode active materials), H01M 4/62 (conductive agents)
- Search Query Combinations: A total of 5 Search Query iterations were executed (see Appendix 2 for details)
- NPL Search: Google Scholar search, keywords including (battery + cathode + additive + …)
Principle: The search process should be transparent enough that “a new examiner could fully reproduce your search steps.”
Standard 2: closest prior art selection Selection Must Be Transparent
Do not simply state “D1 is the closest prior art selection”; also explain “why D1 was chosen over D2”:
“D1 (US10,xxx,xxx) was identified as the closest prior art selection for the following reasons:
(1) D1 belongs to exactly the same technical field as the present invention (lithium battery cathode materials);
(2) The technical problem solved by D1 is the closest to that of the present invention (improving cathode conductivity);
(3) D1 shares 4 out of 6 technical features with the present invention, more than D2 (3 features) and D3 (2 features).By comparison, although D2 also belongs to the same technical field, its focus is on solving the problem of cycling stability through material coating, which diverges significantly from the present invention’s technical pathway of solving conductivity problems through the addition of a conductive agent.”
Standard 3: feature comparison rationale Must Be Specific, Not Vague
A poor comparison:
“D1 discloses a heat dissipation solution similar to that of the present invention”
A good comparison:
| Feature of Present Invention | Corresponding Content in D1 | Finding | Rationale |
|---|---|---|---|
| Uses graphene thermal conductive film | “a heat dissipation film” | Not explicitly disclosed | The “heat dissipation film” in D1 does not specify the material; it cannot be presumed to be graphene |
| Thermal conductive film thickness 0.1–0.5 mm | “thickness of 0.3 mm” | Disclosed | 0.3 mm falls within the claimed protection scope |
| Combined with phase-change material layer | Not mentioned | Not disclosed | D1 does not use phase-change materials |
Note the distinction between “Not explicitly disclosed” and “Not disclosed” — the former indicates that the searcher did in fact search for the feature in D1 but could not find it, rather than simply assuming its absence.
Standard 4: Complete Implementation of the Problem-Solution Approach analysis
In the Inventive Step analysis section, the following must be included:
Step 1: Clear identification of the closest prior art selection + reasons for selection
Step 2: List the Distinguishing Features + reformulate “the technical problem actually solved by the invention”
Step 3: Analyze, for each Distinguishing Feature individually, “whether a Technical Teaching exists”:
- Distinguishing Feature A: Disclosed in D2, where D2 suggests its use for [specific purpose], which is [the same as / different from] the purpose of the present invention. Therefore, a Technical Teaching [exists / does not exist].
- Distinguishing Feature B: Not found in any Prior Art Document, and does not constitute common general knowledge in the art. Therefore, no Technical Teaching exists.
If any “Technical Teaching exists” determination is made in Step 3 → analyze “whether the combination carries a reasonable expectation of success.” Not everything that “can be combined” constitutes an “Inventive Step problem.”
Standard 5: Full Disclosure of Uncertainties
A professional report will flag the “zones of uncertainty”:
“Uncertainties that warrant disclosure:
- D4 (EP2019xxxxx) describes in its abstract ‘a battery cathode containing a conductive additive,’ but the full specification requires a paid subscription to access; it could not be confirmed whether D4 specifically discloses the same addition amount of the conductive additive as the present invention. If the content disclosed in the full text of D4 is closer to the present solution → this may pose a moderate risk to Novelty.
- In the Problem-Solution Approach analysis analysis, the strength of the teaching in the D2+D3 combination lies between ‘clear’ and ‘non-existent.’ In examination practice, different examiners’ assessments of such borderline situations may fluctuate.
- Japanese patent literature was not searched (this search focused on English-language and European academic literature). If the field has substantial accumulations in Japanese-language literature, there may be a risk of omission.”
This offers far more professional value than a vague statement of “comprehensive search conducted” — it helps you understand the risks rather than conceal them.
Standard 6: Strategy Recommendations Must Be Specific and Actionable
A poor strategy recommendation:
“It is recommended to highlight the innovative points of the present invention.”
A good strategy recommendation:
“It is recommended, when drafting claims:
(1) In the independent claim, include ‘the conductive additive is selected from specific materials A, B, or combinations thereof’ as an essential technical feature, because this feature is not explicitly disclosed in any of D1–D3;
(2) In dependent claims, limit the preferred addition amount range of the conductive additive to X%–Y%; this range is not fully overlapped in D2, which can enhance the Novelty robustness of the dependent claims;
(3) In the specification, provide a comparative table of experimental data correlating conductive additive dosage with conductivity performance, to support arguments of ‘unexpected technical effect’ during examination.”
Quality Checklist Matrix for Patentability Search Reports
| Inspection Dimension | Low-Quality Report | High-Quality Report |
|---|---|---|
| Search Transparency | “Comprehensive search” | Search date, databases, keywords, classification codes all listed |
| closest prior art selection | Directly names a D1 | Names D1 and explains why D1 rather than other candidates |
| feature comparison rationale | Vague description / only a single overall conclusion | Feature-by-feature table + rationale for each finding |
| Problem-Solution Approach analysis | Skipped or dismissed in a single sentence | Three steps each developed separately, with analysis in each step |
| Uncertainty | Not mentioned or “conclusion is definitive” | Proactively marks zones of uncertainty and their causes |
| Strategy Recommendations | “Recommend filing” | Specific to claim drafting strategy and examination response anticipation |
Common Report-Writing Mistakes
“Perfunctory Explanation” Paragraphs
Inserting a large block of “general description” in the middle section (e.g., “Under the EPC, Novelty means that…”) — this is filler for those who already understand the concept, and insufficiently detailed for those who do not. Delete it or move it to a “Information the Recipient Needs” section.
“Citing Non-Existent Prior Art”
The report states “according to the prior art literature…” without providing a literature citation. Every reference to prior art should have a corresponding literature source. If something is “common general knowledge in the art,” indicate which textbook or technical manual’s standard description was consulted.
“Ignoring the Legal Status of Cited Prior Art Documents”
The report cites a Prior Art Document but does not address its legal status. Whether the document has been withdrawn, has expired, or is subject to declarations limiting its rights — this information affects the weight of the Prior Art Document in assessing patentability.
Key Takeaways: Search report standards make patentability analysis reproducible. Six standards for a high-quality Patentability Search Report — fully transparent search process, reasoned selection of the closest prior art selection, specific feature comparison rationale with rationales, complete presentation of the Problem-Solution Approach analysis analysis, proactive disclosure of uncertainties, and specific and actionable strategy recommendations. Low-quality reports typically manifest as vague language, lack of feature-by-feature comparison rationale tables, and missing or short-cutted Problem-Solution Approach analysis analysis. Use the “Quality Checklist Matrix” to self-audit every report.
When applying search report standards across a team, PatSnap Analytics can help keep prior art, family data, and assignee context close to the written analysis.
