Patent Maintenance Fees

liveReference

USPTO Patent Maintenance Fee Events — complements the `patents` pack (fleet #3258), which has prosecution events and assignments but cannot say whether a US patent is still in force.

2tools
0msauth
free tier50 calls/day

Tools

get_patent_maintenance_status

Look up a US patent's maintenance-fee history and in-force/expired status: every recorded maintenance-fee event (payments, surcharges, expiration for non-payment, reinstatement, entity-status changes)

No parameters required.

▶Try it
search_maintenance_fee_events

Search USPTO maintenance-fee events across patents by event code, patent-number prefix, and/or event-date range — e.g. all 'EXP.' (expired for non-payment) events in a date window. Returns an exact to

No parameters required.

▶Try it

Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools
bash
curl -X POST https://gateway.pipeworx.io/patent-maintenance-fees/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
Call a tool
bash
curl -X POST https://gateway.pipeworx.io/patent-maintenance-fees/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"get_patent_maintenance_status","arguments":{}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("get_patent_maintenance_status", {});
ask_pipeworx
// Or ask in plain English:
const answer = await px.ask("uspto patent maintenance fee events — complements the `patents` pack (fleet #3258), which has prosecution events and assignments but cannot say whether a us patent is still in force");