Patent Expiration & Maintenance beta

Patent term calculation (20-year, PTA/PTE, terminal disclaimers) and the 3.5/7.5/11.5-year maintenance-fee windows. Serving a seed dataset during beta.

Get an API key Docs

Endpoints

POST /patent/status
POST /patent/calculate-expiration

MCP tools

get_patent_status
calculate_patent_expiration

Example

curl -X POST https://pascaline.io/patent/status \
  -H 'content-type: application/json' \
  -H 'x-api-key: <keyId>.<secret>' \
  -d '{ ... }'

Responses include data_as_of, formula_version (2026.1), citations, and tier (beta). See the full reference and the verification process.

patent expiration API · patent term adjustment API · maintenance fee calculator API