{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/us-patent-and-trademark-office/main/json-schema/uspto-patent-application-schema.json",
  "title": "USPTO Patent Application",
  "description": "JSON Schema for a USPTO patent application record from the Open Data Portal API.",
  "type": "object",
  "properties": {
    "applicationNumberText": {
      "type": "string",
      "description": "Unique patent application number assigned by USPTO",
      "example": "18123456"
    },
    "applicationTypeLabelName": {
      "type": "string",
      "description": "Type of patent application",
      "enum": ["Utility", "Design", "Plant", "Reissue", "Provisional"]
    },
    "applicationStatusCode": {
      "type": "string",
      "description": "Current prosecution status code"
    },
    "applicationStatusDate": {
      "type": "string",
      "format": "date",
      "description": "Date of the most recent status change"
    },
    "applicationFilingDate": {
      "type": "string",
      "format": "date",
      "description": "Date the application was filed with USPTO"
    },
    "grantDate": {
      "type": ["string", "null"],
      "format": "date",
      "description": "Date the patent was issued (null if not yet granted)"
    },
    "patentNumber": {
      "type": ["string", "null"],
      "description": "Issued patent number (null if not yet granted)"
    },
    "inventionTitle": {
      "type": "string",
      "description": "Title of the invention as filed"
    },
    "inventors": {
      "type": "array",
      "description": "List of named inventors",
      "items": {
        "$ref": "#/$defs/Inventor"
      }
    },
    "applicants": {
      "type": "array",
      "description": "List of applicants/assignees",
      "items": {
        "$ref": "#/$defs/Applicant"
      }
    },
    "attorneys": {
      "type": "array",
      "description": "List of registered attorneys",
      "items": {
        "$ref": "#/$defs/Attorney"
      }
    },
    "classifications": {
      "type": "array",
      "description": "Patent classification codes (CPC, USPC)",
      "items": {
        "$ref": "#/$defs/Classification"
      }
    }
  },
  "required": ["applicationNumberText", "applicationFilingDate", "inventionTitle"],
  "$defs": {
    "Inventor": {
      "type": "object",
      "description": "A named inventor on the patent application",
      "properties": {
        "inventorNameText": {
          "type": "string",
          "description": "Full name of the inventor"
        },
        "inventorCity": {
          "type": "string",
          "description": "City of residence"
        },
        "inventorStateCode": {
          "type": "string",
          "description": "State/province code"
        },
        "inventorCountryCode": {
          "type": "string",
          "description": "ISO 3166 country code"
        }
      },
      "required": ["inventorNameText"]
    },
    "Applicant": {
      "type": "object",
      "description": "An applicant or assignee on the patent application",
      "properties": {
        "applicantNameText": {
          "type": "string",
          "description": "Full name or organization name"
        },
        "applicantCity": {
          "type": "string"
        },
        "applicantStateCode": {
          "type": "string"
        },
        "applicantCountryCode": {
          "type": "string"
        }
      },
      "required": ["applicantNameText"]
    },
    "Attorney": {
      "type": "object",
      "description": "A registered patent attorney or agent",
      "properties": {
        "registrationNumber": {
          "type": "string",
          "description": "USPTO registration number"
        },
        "fullName": {
          "type": "string",
          "description": "Full name of the attorney"
        }
      }
    },
    "Classification": {
      "type": "object",
      "description": "Patent classification code",
      "properties": {
        "classificationSymbolText": {
          "type": "string",
          "description": "CPC classification symbol"
        },
        "uspcSymbolText": {
          "type": "string",
          "description": "USPC classification symbol"
        }
      }
    }
  }
}