{
  "patent_number": "US 2058761",
  "country": "US",
  "title": "How Arnold Beckman Invented the Modern pH Meter",
  "original_title": "Apparatus for testing acidity",
  "summary": "A 1936 invention by Arnold Beckman that created the first reliable, portable device for measuring the acidity of chemical solutions using electronic sensors.",
  "what_it_does": "This patent describes an apparatus designed to measure the acidity or alkalinity of a substance, known as pH. It utilizes a glass electrode system to detect electrical potential differences in a solution, which are then amplified to provide a readable measurement. By converting chemical activity into a stable electronic signal, the device allowed for precise monitoring of industrial and laboratory processes that previously relied on imprecise color-matching indicators.",
  "what_it_does_not_cover": [
    "Does not cover digital, microprocessor-based pH sensors developed decades later.",
    "Does not cover non-electronic methods of measuring acidity, such as litmus paper or chemical titration.",
    "Does not cover the underlying scientific theory of ion concentration in solutions."
  ],
  "filed": null,
  "granted": "1936-10-27",
  "expires": null,
  "status": "active",
  "holder": "Arnold O. Beckman",
  "holder_url": "https://patentbrief.org/company/arnold-o-beckman",
  "inventors": [],
  "times_cited": 17,
  "tags": [
    "biotech",
    "mechanical",
    "semiconductors"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/2058761/ph-meter-beckman",
  "markdown_url": "https://patentbrief.org/patent/us/2058761/ph-meter-beckman/md",
  "google_patents_url": "https://patents.google.com/patent/US2058761",
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}