{
  "patent_number": "US 1057423",
  "country": "US",
  "title": "Elwood Haynes' Early Stellite Cobalt-Chromium Alloy",
  "original_title": "Metal alloy.",
  "summary": "A 1913 patent for a durable, corrosion-resistant metal alloy made primarily of cobalt and chromium, which laid the foundation for modern high-performance tools and medical implants.",
  "what_it_does": "The patent describes a specific metal alloy composition primarily consisting of cobalt and chromium. By balancing these two elements, the alloy achieves exceptional hardness and resistance to oxidation and chemical corrosion. This combination allows the metal to maintain its structural integrity even under extreme heat, making it ideal for cutting tools and surgical instruments that must remain sharp and sterile.",
  "what_it_does_not_cover": [
    "Does not cover alloys lacking the specific cobalt-chromium balance defined in the original filing",
    "Does not cover modern superalloys that incorporate nickel or tungsten additives not specified in the 1913 claims",
    "Does not cover manufacturing processes like 3D printing or powder metallurgy used for modern Stellite parts"
  ],
  "filed": "1912-07-20",
  "granted": "1913-04-01",
  "expires": "1932-07-20",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Elwood Haynes",
      "url": "https://patentbrief.org/inventor/elwood-haynes"
    }
  ],
  "times_cited": 18,
  "tags": [
    "mechanical",
    "materials"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/1057423/stellite-cobalt-alloy-haynes",
  "markdown_url": "https://patentbrief.org/patent/us/1057423/stellite-cobalt-alloy-haynes/md",
  "google_patents_url": "https://patents.google.com/patent/US1057423",
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}