How to Check a Patent Family for FTO Risk Signals with AI
Check a patent family for FTO risk signals with AI with Maintain Payment (FTO), retrieving family members and legal status for a publication number in one connected session.
This workflow works in Claude, Claude Code, ChatGPT, or Codex when the selected client supports the required MCP connection. After connecting, the research steps and evidence boundaries are the same.
When you spot a potentially relevant patent during freedom-to-operate screening, you need to know quickly whether its legal status and geographic reach create real risk for your product. A published European application may already have family members in force across markets that matter to your business — or it may remain ungranted with no siblings at all. An AI assistant or coding agent can help frame the screening question and interpret the results, but it has no live connection to current legal status or family records on its own.
Why this needs Maintain Payment (FTO)
FTO screening is unusually sensitive to data freshness: a patent can move from pending to granted, get abandoned, or enter opposition within weeks, and a stale record turns a real risk into a false negative or a dead application into a false alarm. Maintain Payment (FTO) draws on the same corpus behind Patsnap’s other tools — 210M+ patent records across 174 jurisdictions, updated on a rolling basis — and returns family and legal-status data through a single MCP connection, so Claude works from current records rather than what it happened to see in training.
That currency matters more coming from a company built for exactly this kind of screening: Patsnap has focused on patent data and analytics since 2007, and the family and legal-status logic behind this tool draws on that domain-specific track record rather than a general-purpose data feed retrofitted for patents.
What you need before you ask
You need the publication number of the patent you want to screen — sourced from a prior keyword search, a citation trail, or a competitor monitoring report. Maintain Payment (FTO) accepts standard formats such as EP4721726A1, US20240123456A1, or WO2024248530A1; both the family and legal-status tools take that single parameter and return structured records, no Boolean query required. Double-check the number is complete and correctly formatted — a malformed or incomplete identifier returns an empty result rather than a partial one.
Connect Maintain Payment (FTO)
https://connect.patsnap.com/e5851d/mcp?apikey=yourapikey Replace yourapikey with your own Patsnap Open Platform API key before connecting. Keep the completed URL private. - Claude: add the remote MCP connection from Claude’s connector or integration settings.
- Claude Code: add the server as a remote HTTP MCP connection in your user or project configuration.
- ChatGPT: add the server through the supported connector or developer-mode MCP setup available to your workspace.
- Codex: add the server in Codex’s MCP configuration for the relevant local workspace.
The interface differs by client, but you use the same Patsnap connection URL and the same natural-language research prompt.
- Get a Patsnap Open Platform API key.
- Copy the connection URL or JSON config from the Connect panel on the Maintain Payment page.
- Add the server to your AI assistant or coding agent or another MCP-compatible client.
- Restart or reconnect the client, then confirm the family and legal-status tools are available.
Run the example query
Check the patent family and legal status for EP4721726A1.Claude recognizes the request and calls two tools in sequence: annuity_get_patent_family(patent_number="EP4721726A1"), then annuity_get_legal_status(patent_number="EP4721726A1").
What the results tell you
| Publication number | Family scope |
|---|---|
| EP4721726A1 | Simple family |
| JP2026518802A | Simple family |
| CN121620359A | Simple family |
| WO2024248530A1 | Simple family |
| KR1020240173155A | Extended (INPADOC/Patsnap) family |
- Simple legal status
- Pending
- Legal status
- Published
- Legal date
- 2026-04-08
“Pending” means examination is still in progress — no grant or abandonment has been recorded. Combined with the family, this gives a preliminary FTO signal: the European application isn’t yet granted, but corresponding filings exist in Japan, China, and Korea, and through the PCT route.
Go further with follow-up questions
Ask your AI assistant or coding agent to retrieve legal status for each family member individually — JP2026518802A, CN121620359A, and KR1020240173155A — to compare procedural states across jurisdictions. You can also Ask your AI assistant or coding agent to summarize the legal timeline across event dates, flag any member that recently reached grant or entered national phase, or repeat the family-and-status retrieval for additional candidate patents and rank them by jurisdictional coverage or procedural maturity — building a jurisdictional risk map in the same conversation.
Frequently asked questions
What’s the difference between simple and extended family?
A simple family groups filings that share the same priority claim. An extended (INPADOC/Patsnap) family is broader, including filings connected through any shared priority — useful for discovery, but worth reviewing individually since not every member shares identical claim scope.
Does a “Pending” status mean it’s safe to proceed?
No. Pending means examination hasn’t concluded — the application could still be granted with claims that create risk. Treat it as one input to a broader FTO review, not clearance.
Why does data freshness matter so much for FTO screening?
Legal status changes — grants, abandonments, oppositions — can happen within weeks. A screening result built on stale data can miss a newly granted risk or flag an application that’s already lapsed.
Can Claude check family and legal status without an MCP connection?
No. An AI assistant or coding agent can help frame the screening question and interpret the results, but it has no live connection to current family or legal-status records on its own — Maintain Payment (FTO) supplies that connection through MCP.
Can I use this workflow in Claude, Claude Code, ChatGPT, or Codex?
Yes, provided the selected client and workspace support the required MCP connection. Connect the same Patsnap server, then use the natural-language steps shown in this guide; interface details may differ by client.
Screen a patent family for FTO risk
Connect Maintain Payment (FTO) and check family and legal status in one conversation.
