{
  "patent_number": "US 2130523",
  "country": "US",
  "title": "How Wallace Carothers Invented Nylon",
  "original_title": "Linear polyamides and their production",
  "summary": "The foundational 1935 patent for synthetic linear polyamides, the chemical process that created the material we now call nylon.",
  "what_it_does": "This patent describes the chemical synthesis of high-molecular-weight linear polyamides by heating diamines with dibasic acids. By controlling the polymerization process, the inventor created long-chain molecules that could be drawn into strong, flexible fibers. This process transformed simple chemical building blocks into a material capable of replacing natural silk in textiles and industrial applications.",
  "what_it_does_not_cover": [
    "Does not cover non-linear or branched polyamide structures.",
    "Does not cover the specific manufacturing machinery used for spinning the fibers.",
    "Does not cover the use of polyamides in non-fiber applications like molded plastics."
  ],
  "filed": "1935-01-02",
  "granted": "1938-09-20",
  "expires": "1955-09-20",
  "status": "expired",
  "holder": "EI Du Pont de Nemours and Co",
  "holder_url": "https://patentbrief.org/company/ei-du-pont-de-nemours-and-co",
  "inventors": [
    {
      "name": "Wallace H Carothers",
      "url": "https://patentbrief.org/inventor/wallace-h-carothers"
    }
  ],
  "times_cited": 299,
  "tags": [
    "materials",
    "chemical_engineering"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/2130523/nylon-polyamide-carothers",
  "markdown_url": "https://patentbrief.org/patent/us/2130523/nylon-polyamide-carothers/md",
  "google_patents_url": "https://patents.google.com/patent/US2130523",
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}