{
  "patent_number": "US 2543181",
  "country": "US",
  "title": "How Polaroid's Instant Film Pods Work",
  "original_title": "Photographic product comprising a rupturable container carrying a photographic processing liquid",
  "summary": "A 1951 invention by Edwin Land that enabled instant photography by packaging liquid developer inside a breakable pod attached to the film sheet.",
  "what_it_does": "This patent describes a self-contained photographic system where a rupturable container (a small pod) holds a liquid processing chemical. When the user passes the film through rollers, the container breaks, and the liquid is squeezed out onto a photosensitive sheet. The liquid contains a thickening agent to ensure it spreads evenly across the image area. This chemical bath then reacts with the exposed film to develop the image immediately on the spot.",
  "what_it_does_not_cover": [
    "Does not cover digital image sensors or electronic image processing.",
    "Does not cover film development processes that require external chemical baths or darkroom tanks.",
    "Does not cover non-rupturable liquid storage methods like cartridges with pumps."
  ],
  "filed": "1948-12-11",
  "granted": "1951-02-27",
  "expires": "1968-12-11",
  "status": "expired",
  "holder": "Polaroid Corp",
  "holder_url": "https://patentbrief.org/company/polaroid-corp",
  "inventors": [
    {
      "name": "Edwin H Land",
      "url": "https://patentbrief.org/inventor/edwin-h-land"
    }
  ],
  "times_cited": 119,
  "tags": [
    "consumer_electronics",
    "mechanical"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/2543181/polaroid-instant-camera",
  "markdown_url": "https://patentbrief.org/patent/us/2543181/polaroid-instant-camera/md",
  "google_patents_url": "https://patents.google.com/patent/US2543181",
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}