{
  "patent_number": "US 808897",
  "country": "US",
  "title": "How Willis Carrier Invented the Modern Air Conditioner",
  "original_title": "Apparatus for treating air.",
  "summary": "Willis Carrier's 1906 patent for an apparatus to control humidity and temperature, forming the technical foundation for modern air conditioning systems.",
  "what_it_does": "The apparatus treats air by passing it through a spray of water to control its moisture content and temperature. By adjusting the temperature of the water spray, the system can either cool the air or remove humidity through condensation. This process allows for the precise regulation of the air's dew point, which is the temperature at which water vapor turns into liquid. The device essentially creates a controlled environment by balancing thermal and moisture levels within a stream of air.",
  "what_it_does_not_cover": [
    "Does not cover chemical-based air purification or filtration systems.",
    "Does not cover modern vapor-compression refrigeration cycles using chemical refrigerants.",
    "Does not cover systems that lack a water-spray-based humidity control mechanism."
  ],
  "filed": "1904-09-16",
  "granted": "1906-01-02",
  "expires": "1924-09-16",
  "status": "expired",
  "holder": "Buffalo Forge Co",
  "holder_url": "https://patentbrief.org/company/buffalo-forge-co",
  "inventors": [
    {
      "name": "Willis H Carrier",
      "url": "https://patentbrief.org/inventor/willis-h-carrier"
    }
  ],
  "times_cited": 19,
  "tags": [
    "mechanical",
    "energy"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/808897/air-conditioning-carrier",
  "markdown_url": "https://patentbrief.org/patent/us/808897/air-conditioning-carrier/md",
  "google_patents_url": "https://patents.google.com/patent/US808897",
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}