Introduction

“We’re an SME doing cross-border e-commerce — patentability searches are too expensive. Is there a cheaper way that still meets our basic needs?”

This is the most common question from SMEs and cross-border e-commerce sellers. A single report from a professional patentability search firm typically costs thousands to tens of thousands of RMB, which is prohibitively expensive for products with thin margins. But skipping the search entirely amounts to blind filing — wasting the filing fee is the least of your worries; a useless “patent certificate” is an even bigger waste of your IP budget.

This article provides a low-cost patentability search strategy for SMEs and cross-border e-commerce sellers, so every penny you spend goes exactly where it counts.

What Scenarios Are Suitable for Low-Cost Patentability Search?

Let’s be clear up front: low-cost patentability search is appropriate for scenarios where the risk is tolerable and the degree of innovation is relatively basic — not for high-value core technology.

Core principle: Low-cost patentability searches trade “comprehensiveness” for “speed and cost.” For high-value core inventions, a full patentability search process is still recommended.

The Four-Step Low-Cost Patentability Search Method

Step 1: Do-It-Yourself Initial Screening with Google Patents

Why start with Google Patents:

• Completely free
• Covers major patent offices worldwide (USPTO, EPO, CNIPA, JPO, KIPO, WIPO)
• Powerful AI semantic search — you don’t need precise keywords; a plain description can still surface relevant patents
• The “Similar” recommendation feature effectively gives you free citation expansion

Practical tips:

1. Describe your product / invention in natural language — don’t obsess over “precise keywords”
2. Review the first 30–50 results returned
3. For patents that appear relevant, click “Similar” to explore recommendations
4. Record highly relevant patent numbers to build a comparison document pool for subsequent in-depth analysis

Google Patents search tips:

• Search primarily in English (Google Patents’ English semantic search works best); supplement with keywords in the target market language when necessary
• Use the date filter and prioritize patents from the last 10 years (but don’t overlook early classic patents)
• Pay attention to the legal status of patents (Active / Expired) — expired patents are actually good opportunities

Step 2: Supplement with a Targeted Espacenet Search

Although Google Patents covers a wide range, its update speed may lag behind and its field-search capabilities are not as robust as those of professional databases. Fill the gap with an Espacenet (EPO’s free database) search:

Espacenet (worldwide.espacenet.com):

• Completely free
• Covers patent literature from 100+ countries / regions, updated promptly
• Supports advanced field search — at minimum, try:
• Keywords (Title, Abstract)
• IPC / CPC classification codes (if you’ve found relevant classification codes from patents discovered on Google Patents)
• Applicant / Inventor (if you’ve identified competitors)

Example in practice:
Suppose your product is a “collapsible storage box.” Use the following search approach:

Search 1: ti="folding" AND ti="storage box"
Search 2: ab="foldable" AND ab="container"
Search 3: cpc=B65D (containers) AND ti="collapsible"

Step 3: Check for “Prior Sale” on E-Commerce Platforms

For cross-border e-commerce sellers, a frequently overlooked source of prior art is — products already sold on e-commerce platforms.

If your innovative product is already being sold by someone on Amazon, eBay, Alibaba, AliExpress, or similar platforms, and the sale date predates your patent filing date — this may constitute disclosure by use (if the product’s structure can be understood by disassembly) or disclosure by written description (if the product page describes the technical features in detail).

How to check:

1. Search on Amazon, eBay, AliExpress, and other platforms using product names or functional keywords
2. Pay special attention to products whose “Date First Available” is earlier than your planned filing date
3. Check product detail pages for exploded-view diagrams, installation tutorials, and other technical details
4. Read buyer reviews — user feedback sometimes reveals product technical features
5. If you discover a highly similar product that was already on sale, take screenshots and archive them (including the URL and timestamp); this can be critical in subsequent examination or invalidation / opposition proceedings

Note: The value of this check goes both ways:

• It prevents your own application from having its novelty destroyed by someone else’s prior sale
• It helps you discover whether competitors are selling products that infringe your patent (if you already have one)

Step 4: Basic Legal Status and Patent Family Review

On the basis of a preliminary assessment of filing feasibility, conduct a simple legal status and patent family review:

• Legal Status: Are the similar patents you found still in force? (If expired → the barrier is removed)
• Patent Family Information: Does the similar patent have a family member in your target market country? (If not → you have more room to file in that target market)
• Actual Scope of Claim Protection: What do the claims of the similar patent actually protect? (If it protects a “XX + YY” combination and yours is only the “XX” element, you may still have room to operate)

All of this information is available for free on both Google Patents and Espacenet.

When a “Low-Cost Search Isn’t Enough” — Signals That You Should Upgrade

If your low-cost search turns up any one of the following signals, consider upgrading to a full patentability search:

1. You found an extremely close patent — the technical solution is 95% or more identical to yours → a more systematic search is needed to confirm whether there are additional similar documents
2. You discovered a very high volume of patents in this technology area (>100 hits) → the field is highly competitive; missing just one document could mean a wasted filing
3. You realize this invention may be a core selling point and you plan to enter the U.S. and European markets → a multi-jurisdiction full patentability search is needed
4. Significant R&D investment has been made, and the survival of the patent directly affects market strategy → it is worth increasing the search budget
5. You found 3 or more similar patents from different patent holders → the field is highly competitive and requires professional judgment

Low-Cost Patentability Search Checklist

Preparation:

• [ ] A written description, images, and (if available) a 3D model of the product / invention are ready
• [ ] The target market has been clearly defined (domestic only or multiple countries)
• [ ] The type of filing has been clearly defined (invention patent or utility model)

Search Execution:

• [ ] Google Patents natural-language search (primarily in English; supplement with other languages as needed)
• [ ] Google Patents “Similar” recommendation review
• [ ] Espacenet advanced field search supplement
• [ ] Amazon / eBay / AliExpress “Prior Sale” check
• [ ] Legal status and patent family review for key similar patents

Upgrade Decision:

• [ ] No highly similar patents found → Low-cost search is sufficient
• [ ] Found 3 or more similar but not fully overlapping patents → Low-cost search is sufficient, but distinguish carefully when filing
• [ ] Found one patent with high coverage → ⚠️ Consider upgrading the search
• [ ] Found similar patents from multiple patent holders → ⚠️ Consider upgrading the search

A Final Tip: Use Utility Models / Short-Term Patents to Lower the Bar

If your target market allows Utility Models or Short-term Patents — such as China, Germany, Japan, South Korea, etc. — there is more operational flexibility than with standard invention patents:

• The inventive step threshold for utility models is generally lower than for invention patents
• In most countries, utility models only protect the shape, structure, and their combination (methods are not protected)
• If your product has some structural innovation (even a modest improvement) and the low-cost patentability search has not uncovered highly overlapping prior art documents, you can file with confidence
• Examination is fast (typically 6–12 months), and quick grant can serve as a marketing tool

But note: in most jurisdictions, utility models are granted without substantive examination, meaning their “legal stability” is lower than that of invention patents. For utility models supported only by a low-cost patentability search, you should also monitor the risk of subsequent invalidation or opposition proceedings.

Smart Strategies for Low-Cost Patentability Searches

Strategy 1: Staged Filing

First file a utility model / short-term patent for the most critical structural features (a low-cost search is sufficient), and before publication, decide whether to file a formal invention patent application based on market response and competitive dynamics (upgrading to a full patentability search at that point). Note: if you later wish to claim priority when filing the formal invention patent application, you should file within 12 months of the first filing date to ensure the filing date is not behind the publication date of the first application.

Strategy 2: Pre-Filing Monitoring for Six Months

Before filing, spend six months continuously monitoring e-commerce platforms and competitors’ new product launches. This six-month tracking itself serves as a form of “dynamic patentability search.”

Strategy 3: Use Design Patents to Protect Structural Features

For innovations in product appearance and structure, a Design Patent can protect “the shape, pattern, or their combination” of a product, with even lower filing costs and faster grant. If your structural innovation also has distinctive visual effects, consider supplementing protection with a design patent.

Key takeaway: A low-cost patentability search can support early go/no-go decisions for SMEs and cross-border sellers. SMEs and cross-border e-commerce sellers can conduct a low-cost patentability search through four steps — (1) free AI semantic search on Google Patents, (2) supplementing with advanced field search on Espacenet, (3) “Prior Sale” screening on platforms such as Amazon / eBay / AliExpress, and (4) basic legal status review. When highly similar prior art documents are found or the technology field is highly competitive, upgrade to a full patentability search. When filing in jurisdictions that permit utility models / short-term patents, the depth of the search may be appropriately reduced, but be aware that their legal stability is lower than that of standard invention patents.

When the initial low-cost patentability search finds close prior art or conflicting legal status, PatSnap Analytics can help teams move from free screening to structured patent family and competitor review.