{
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  "PrimaryITInvestmentUII": " ",
  "accessLevel": "public",
  "accessLevelComment": " ",
  "accessURL": "https://data.uspto.gov/bulkdata/datasets/ptmnfee2",
  "accrualPeriodicity": "R/P1W",
  "bureauCode": [
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  "contactPoint": {
    "@type": "vcard:Contact",
    "fn": "Christopher Leithiser",
    "hasEmail": "mailto:Chris.Leithiser@uspto.gov"
  },
  "dataDictionary": "MaintFeeEventsFileDocumentation.doc",
  "dataQuality": true,
  "description": "Contains recorded maintenance fee events for patents granted from September 1, 1981 to present. Each new weekly file is cumulative.",
  "distribution": [
    {
      "accessURL": "https://data.uspto.gov/bulkdata/datasets/ptmnfee2",
      "format": "ascii"
    }
  ],
  "format": "text",
  "identifier": "EIP-5710P-OL",
  "issued": "2009-12-01",
  "keyword": [
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  "language": [
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  "license": "https://creativecommons.org/publicdomain/mark/1.0",
  "mbox": "data@uspto.gov",
  "modified": "2025-08-28",
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    "name": "Patents",
    "subOrganizationOf": {
      "@type": "org:Organization",
      "name": "U.S. Patent and Trademark Office (USPTO)",
      "subOrganizationOf": {
        "@type": "org:Organization",
        "name": "Department of Commerce (DOC)",
        "subOrganizationOf": {
          "@type": "org:Organization",
          "name": "U.S. Federal Government"
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      }
    }
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  "references": [
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  "spatial": " ",
  "systemOfRecords": " ",
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  "theme": [
    "events",
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    "maintenance",
    "patent",
    "patent grant"
  ],
  "title": "Patent Maintenance Fee Events (1981 - Present)",
  "webService": "https://data.uspto.gov/bulkdata/datasets"
}