{
  "patent_number": "US 3927193",
  "country": "US",
  "title": "Using Radioactive Antibodies to Find Tumors Inside the Body",
  "original_title": "Localization of tumors by radiolabelled antibodies",
  "summary": "A 1973 method for finding cancer tumors by injecting patients with radioactive antibodies that attach to tumor-specific proteins, allowing doctors to scan for their location.",
  "what_it_does": "The patent describes a diagnostic technique where a patient is injected with an antibody that has been tagged with a radioactive isotope. This antibody is specifically designed to bind to carcinoembryonic antigen, a protein often found in high levels near certain tumors. Once the antibody attaches to the tumor, the radioactive tag emits gamma rays. A photoscanning device then detects these rays to map exactly where the tumor is located within the body.",
  "what_it_does_not_cover": [
    "Does not cover the use of antibodies for treating or killing tumor cells.",
    "Does not cover scanning methods that use non-radioactive markers like fluorescent dyes.",
    "Does not cover antibodies that target proteins other than carcinoembryonic antigen.",
    "Does not cover isotopes with a half-life significantly longer than 8 days."
  ],
  "filed": "1973-05-18",
  "granted": "1975-12-16",
  "expires": null,
  "status": "active",
  "holder": "F Hoffmann La Roche AG",
  "holder_url": "https://patentbrief.org/company/f-hoffmann-la-roche-ag",
  "inventors": [
    {
      "name": "Frederick James Primus",
      "url": "https://patentbrief.org/inventor/frederick-james-primus"
    },
    {
      "name": "Hans John Hansen",
      "url": "https://patentbrief.org/inventor/hans-john-hansen"
    }
  ],
  "times_cited": 66,
  "tags": [
    "biotech",
    "pharmaceutical"
  ],
  "abstract": "A method of utilizing radiolabelled antibodies to carcinoembryonic antigens for determining the site of tumors which produce or are associated with carcinoembryonic antigen is disclosed.",
  "url": "https://patentbrief.org/patent/us/3927193/ivermectin",
  "markdown_url": "https://patentbrief.org/patent/us/3927193/ivermectin/md",
  "google_patents_url": "https://patents.google.com/patent/US3927193",
  "relatedPatents": []
}