{
  "url": "https://openlegislation.uk/patents-act-1949/section-61",
  "json_url": "https://openlegislation.uk/patents-act-1949/section-61.json",
  "legislation": "ukpga/Geo6/12-13-14/87",
  "legislation_title": "Patents Act 1949",
  "legislation_url": "https://openlegislation.uk/patents-act-1949",
  "path": "section/61",
  "kind": "section",
  "number": "61",
  "heading": "Counterclaim for revocation in action for infringement.",
  "text": "A defendant in an action for infringement of a patent may, without presenting a petition, apply in accordance with rules of courtrules made under section seven of the Northern Ireland Act 1962 by way of counterclaim in the action for revocation of the patent.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Words “rules” to “1962” substituted (N.I.) for words “rules of court” by Northern Ireland Act 1962 (c. 30), Sch. 1 Pt. I"
    },
    {
      "type": "M",
      "label": "M1",
      "text": "1962 c. 30."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/Geo6/12-13-14/87/section/61",
    "retrieved_at": "2026-10-29T11:19:59.574435+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}