Expiry and maintenance-fee status

The request

curl -s -G -H "X-Api-Key: YOUR_KEY" https://patentref.io/api/v1/patent/ \
  --data-urlencode 'q={"patent_id":"10905426"}' \
  --data-urlencode 'f=["patent_id","patent_title","lapse"]'

YOUR_KEY stands for your key. The demo sent this request without one, on its shared allowance.

The answer

Status 200, X-Data-Version 20261103.2

{
  "error": false,
  "count": 1,
  "total_hits": 1,
  "patents": [
    {
      "patent_id": "10905426",
      "patent_title": "Detachable motor powered surgical instrument",
      "lapse": [
        {
          "expiry_status": "active",
          "expiry_date_estimated": "2028-03-03",
          "expiry_basis": [
            "term_20y",
            "pta_days:18"
          ],
          "reinstatement_possible": false,
          "fee_status": null,
          "lapse_date": null,
          "reinstated_date": null,
          "prior": null,
          "prior_pct": null,
          "fwd_early": 485,
          "fwd_late": 0,
          "sleeper_flag": false,
          "as_of": "2026-11-03",
          "data_version": "20261103.2"
        }
      ]
    }
  ]
}