What is a Patentability Search/Novelty Search/Patent Search?

A Patentability Search is conducted on an innovative idea, disclosure, or preliminary set of claims to determine if the idea has a chance of being patented, with extensive knowledge about what already exists in the domain or field of the invention. The documents it finds are known as prior art.

For an invention to be patentable, three major requirements must be fulfilled:

• Novel
• Non-obvious
• Useful (industrially applicable)

In practice, “novelty search”, “patentability search” and “patent search” are often used interchangeably. Strictly, they answer different questions: a novelty search asks only whether the invention has been disclosed before, while a patentability search asks whether it is both novel and non-obvious. Teams usually run a quick novelty search on a rough draft of the invention first, then a more thorough patentability search for inventions that show signs of novelty.

A preliminary draft of the claims or a provisional application is often used to conduct the patentability search before the application is examined. The results help prepare the final claims and establish claim boundaries that define the scope of the invention. The prior art found can also be cited in the application as background knowledge.

What Is a Novelty Search?

A novelty search checks whether an invention is new. It scans patents, published applications and non-patent literature for any single reference that already discloses the idea. The question is binary: has this been disclosed before? Because it tests only the newness requirement, a novelty search is narrower, faster and cheaper than a patentability search.

Novelty is judged one document at a time: a claim lacks novelty only if a single prior art reference discloses every feature of it. The single-reference rule for novelty is explained in our prior art guide.

What Is a Patentability Search?

A patentability search tests both requirements a patent must clear: novelty (is the invention new?) and non-obviousness, also called inventive step (would it be obvious to a person skilled in the art?). Because an examiner can reject a claim as obvious by combining two or more documents, a patentability search also looks at combinations of prior art, not only single references.

Novelty Search vs Patentability Search: Key Differences

Every patentability search includes a novelty check, but a novelty search alone does not answer the obviousness question.

Which Search Do You Need, and When?

• During ideation: run a novelty search. If a single reference already discloses the idea, you learn that before spending on anything further, and R&D effort can be directed to ideas that are actually new.
• Before filing: run a patentability search. Filing carries attorney fees, drafting time and prosecution costs, so test novelty and non-obviousness before you pay to find out.
• Before launching a product: run a freedom-to-operate analysis. It is a different search, focused on in-force patents you could infringe.
• More than once: repeat the search at key points in the innovation lifecycle, for example at ideation and again just before the application is submitted.

What is a Patent?

A patent is a type of intellectual property that grants its owner the right to prevent others from making, using, or selling an invention for a set period of time in return for publishing a disclosure of the innovation. To obtain patent rights, one must follow the steps set by the regional patent office, which assesses the invention’s novelty, inventiveness, and usefulness.

The Importance of Patents

Unlike a research paper, a patent grants its owner exclusive rights, preventing others from using the inventor’s idea. A party who wishes to implement, use, or benefit from a patented invention must obtain a license or approval from the patent owner.

Patent holders can commercialize the invention themselves or license it to others in exchange for royalties, and the patent protects the invention from unauthorized use.

What is a Patent Search?

A patent search is a search conducted to identify documents similar in nature to one’s invention. Depending on the question being asked, it can be a novelty search, a patentability search, a prior art search, a state-of-the-art (landscape) search, an invalidity search, or a freedom-to-operate search.

Patent searches use databases such as Google Patents, Espacenet, the USPTO, CNIPA, J-PlatPat, and XLSCOUT.

XLSCOUT provides access to 170M+ patents and 220M+ non-patent literature references (see XLSCOUT data coverage). XLSCOUT’s prior art and patentability search tool is Novelty Checker LLM.

Types of Patent Searches

The main patent search types differ by the question they answer and when in the innovation cycle you need them:

A landscape search offers an in-depth look at technology in a specific sector, including key technologies, major players and filing trends, so R&D teams can shape their work around it. A patentability search is not the same as an invalidation search: an invalidation search looks for disclosures made before a granted patent’s priority date that could make it invalid.

Why Conduct a Patentability Search?

You may think your innovation is unique, but you won’t know until you search. A patentability search estimates how likely an invention is to be granted a patent by comparing it with existing prior art. It prevents spending on applications that will be rejected and shows which features to focus the claims on.

Because it takes significant time and money to develop an invention, the creator should ensure that no one else has disclosed the innovation before filing. During a patentability search, prior art for similar devices and methods that predate the invention is reviewed to determine whether the invention appears new and non-obvious.

Even if the search shows the invention is not patentable as it stands, it reveals the closest prior art, so the application can emphasize the parts that are novel and not obvious to a person skilled in the art.

Without a search, too much time and money is often invested in describing aspects of the invention that are unlikely to be patentable, and too little in the aspects that are.

A Patentability Search is Essential for the Following Reasons

• It helps the inventor better understand the scope of the invention.
• It helps the patent drafter write claims that focus on what is new compared with the prior art.
• The applicant is better prepared for rejections and office actions during prosecution.
• It avoids working on an innovation that is already patented or disclosed, saving time and money.
• Existing patents can suggest ways to improve the innovation and distinguish it from others.
• You learn about competitors’ inventions, and potential partners, investors or business risks.
• It may reveal prior art that calls the validity of a competitor’s patent into question.

Note: a patentability search does not tell you whether you are free to make or sell a product. Avoiding infringement of other companies’ patents requires a separate freedom-to-operate search.

Does a Novelty Search Guarantee a Patent?

No. A thorough novelty or patentability search reduces risk but cannot guarantee a patent. US patent applications are generally published 18 months after the earliest filing date, so recently filed applications may not yet be visible, and the examiner may weigh the prior art differently. The search improves the odds and the quality of the claims.

Patentability Search

A patentability search provides an important indication of whether an innovation will qualify for a patent. It compares the invention with previously published works, including patent literature and non-patent literature. It is the most widely used type of patent search and is often referred to as a novelty search or a prior art search.

Importance of Patentability Search

• Examining prior art, related patent applications, and non-patent literature in the same field helps you draft the application correctly and reduces the risk of it being invalidated later.
• By comparing your application with the prior art, you can anticipate objections a patent office may raise and prepare office action responses.
• The search directs attention to the novel, non-obvious aspects of the innovation instead of features that are already known.

• Better claims: knowing the closest prior art lets the drafter claim the novel points as broadly as the prior art allows.
• Stronger patents: prior art found and considered before filing is less likely to surprise you if the patent is later challenged.
• Business value: regular searches help assess the novelty and value of inventions and direct R&D resources effectively.

Even if you believe your invention is unique, you should conduct a patentability search, either on your own or with the help of a search professional or a tool such as Novelty Checker LLM.

What is prior art, and what types of prior art are searched?

Prior art is any information made available to the public before the effective filing date of a patent application. It includes granted patents, patent applications, and non-patent literature such as research publications, theses, standards, white papers, products, articles, videos, blog posts, and other internet publications.

There is no cut-off date and no geographical limit: prior art can be centuries old or very recent, and published anywhere in the world.

An inventor’s own public disclosure can also count as prior art. In the US, disclosures made by the inventor 1 year or less before the effective filing date are generally excluded under the grace period, but many other jurisdictions, including Europe, have no general grace period. File before you disclose where possible.

Where to Look for Prior Art?

Various paid and free databases can be used to identify patent and non-patent literature, including XLSCOUT, Lens.org, Google Patents, Google Scholar, IEEE Xplore, IETF, 3GPP and ETSI standards, Espacenet, J-PlatPat, KIPRIS, and CNIPA. See our overview of patent search databases.

How to Conduct a Patentability Search?

Start from an invention disclosure, extract its key features, and build search strings from keywords, synonyms and patent classifications. Search patents and non-patent literature, follow the citations of relevant documents, then analyse the closest references feature by feature and record the findings in a search report.

1. Capture the invention disclosure. Collect a detailed description with drawings, figures and any draft claims.
2. Extract the key features. Break the invention into the elements that make it work and identify which ones are likely to be new.
3. Build search strings and classifications. Combine keywords, synonyms, assignees, inventors and IPC/CPC classes.
4. Search patents and non-patent literature. Use several databases, and an AI semantic search to catch documents that use different wording.
5. Analyse the closest prior art. Map each key feature against the closest references and check citations (forward and backward) of relevant documents.
6. Prepare the search report. Summarise what is disclosed and what is not, and form a patentability view.

Use a Variety of Search Engines

Free and paid databases each have their own strengths. The USPTO database is the official US source; the WIPO PATENTSCOPE database covers PCT international applications as well as national collections; Google Patents is quick and covers documents going back many years.

XLSCOUT’s search platform and Novelty Checker LLM cover 170M+ patents and 220M+ non-patent literature references. Use each tool’s help sections and advanced search features to improve your search.

Keywords and Synonyms

Cover a wide range of keywords. Many patents use non-obvious language, so search with as many terms related to your invention as possible, including common misspellings (for example, “receive” and “recieve”). An AI semantic search reduces this burden by matching meaning rather than exact words.

Patent Classifications

Understand the relevant classification systems: CPC and IPC are used widely, the US also used the USPC, and Japan uses FI and F-terms. Knowing which classes and subclasses your invention belongs to makes the search more effective. XLSCOUT’s Patent Search tool includes an IPC/CPC Helper that suggests relevant classifications from a simple keyword search.

Competing Prior Arts

Inventions are solutions to existing problems, and a single problem can have multiple solutions. Documents describing other solutions to the same problem are competing prior art and can significantly affect how you amend the invention to keep it novel.

Prior Art Analysis

Once the search is complete, the next task is prior art analysis: extracting the closest references and mapping relevant text against each key element of the invention. For novelty, the strongest reference is a single document that discloses all the key elements.

For obviousness, a combination of references that together cover the key elements is relevant. If no reference discloses the novel features, the closest citations help draft the application and refine the claims around those features.

How to Determine if Anything is Patented?

If you find granted patents or published applications that disclose the novel features of your innovation, the innovation is already disclosed and your invention is not patentable as claimed. Many inventions, ideas and documents are never patented but exist in the public domain; these are prior art too.

To check whether a specific product is patented, identify the company behind it and search its patent portfolio in a database such as XLSCOUT or Google Patents. For a large portfolio, narrow the results with keywords for the product’s features and review titles, abstracts and claims.

How Long Does a Patentability Search Take?

It depends on the method. An AI tool such as Novelty Checker LLM returns a first-pass prior art set in minutes. A manual search can take from hours to days, depending on the field, the quality of the search strings and how quickly a strong reference turns up. Novelty searches are usually quicker than full patentability searches.

Patentability Search Report

A patentability search report presents the analysis of the patents and non-patent citations found during the search. Depending on scope, it may be called a patent search report, a prior art search report, a state-of-the-art report or a landscape search report. It typically includes:

• The closest citations, hand-picked against the key features of the invention.
• A summary of each citation and what it does and does not disclose.
• A feature matrix or claim chart mapping prior art text against each element of the invention.
• A patentability viewpoint explaining which elements appear novel and non-obvious, and should be the focus of the claims.

Reports can be prepared in Word, PowerPoint or Excel and can include charts. If the analysis shows the invention is new and non-obvious, the inventor can proceed with drafting; if close prior art is found, the invention or claims may need to be amended.

Factors to Consider When Estimating the Cost of a Patent Search

1. Scope of Search. The purpose of a search is to decide whether filing is worthwhile. A narrow search costs less but risks missing prior art that could overturn the patent years later. The more thorough the search, the better protected you are.

2. Search Logic. Simple natural-language queries are cheapest. Advanced searches use Boolean operators, proximity searches, classifications and assignee data, and are more likely to surface relevant prior art.

3. Searcher Expertise and Coverage. Results depend on the searcher’s technical knowledge of the field, command of search techniques and ability to cover non-English documents. Ask what databases, languages and quality checks a provider uses.

4. Search Deliverable. A low-cost search may deliver only a list of documents, leaving the analysis to you. A feature matrix or claim chart costs more but saves time, and a patentability opinion is the most complete deliverable. Paying for a better deliverable can cost less than the extra attorney time needed to evaluate a weak one.

Common Mistakes in Novelty Search

• Searching too late: start while the invention is still being developed, before the application is drafted.
• Relying on keywords alone: patents often use different terminology; combine keywords with classifications and semantic search.
• Ignoring non-patent literature: papers, standards and product documentation are prior art too.
• Treating the result as a guarantee: unpublished applications and examiner judgment can still affect the outcome.
• Skipping expert review: have a patent professional review the results before a filing decision.

For more, see common mistakes in patent searches.

How Does XLSCOUT’s Novelty Checker LLM Help?

Novelty Checker LLM handles both novelty and patentability checks in one workflow:

• Novelty check: it takes your invention disclosure and surfaces anticipating references across 170M+ patents and 220M+ non-patent literature references, spanning 106+ jurisdictions.
• Patentability assessment: it extends the analysis beyond single-reference novelty toward the non-obviousness question, generating a Key Feature Analysis and a ranked prior art set.
• Expert review: a qualified patent professional reviews the output before it informs a filing decision.

Once the patentability position is clear, Drafting LLM can help prepare a first draft of the application for professional review. For an overview of how AI is used across patent searching, see AI patent search: how it works and best practices.

Conclusion

A novelty search tells you early whether an idea has already been disclosed; a patentability search tells you, before you pay to file, whether the invention is both new and non-obvious. Running the right search at the right stage saves R&D and filing costs, sharpens the claims, and prepares you for examination. Neither replaces a freedom-to-operate review before launch, and neither guarantees a grant.