Retrieve patent bibliographic data and legal status via the EPO Open Patent Services (OPS) API

Steps

1. Register for an EPO OPS developer account at ops.epo.org to obtain a consumer key and secret; authenticate via OAuth 2.0 client credentials flow to obtain a bearer token.
2. Retrieve bibliographic data for a known publication number via GET https://ops.epo.org/3.2/rest-services/published-data/publication/epodoc/{publication_number}/biblio; parse the returned EPODOC XML for title, applicant, inventor, filing date, and priority claims.
3. Query patent family data via the family endpoint to retrieve all equivalent publications across jurisdictions for a given patent.
4. Retrieve legal status events (grants, lapses, assignments, license registrations) via the legal endpoint for the publication number; parse events to determine if the patent is currently in force.
5. For prior art searches, use the full-text search endpoint at /rest-services/published-data/search with CQL query syntax; filter by date, classification (IPC/CPC), and applicant.
6. Supplement with USPTO Patent Center data via the USPTO PatentsView API (patentsview.org/api) for US-specific prosecution history and assignment records.