Google Patents API – Patent Search, Claims & Legal Status

Search Google Patents and get the results as clean rows: by keyword, by company, by patent office and by date, or look up patent numbers directly. Add the details to get the abstract, the claims, the legal status and expiry, CPC codes and citation counts.

Built for patent attorneys and IP teams doing prior-art and freedom-to-operate checks, for analysts tracking what competitors file, and for AI agents that need patent data mid-task.

What you get

• Search results: publication number, title, assignee, priority, filing, publication and grant dates, language, the Google Patents link and the PDF link.
• Filters: keywords (Google Patents syntax works), companies, patent offices (US, EP, WO, CN, JP, KR and 100+ more), priority date range, granted or applications, and order.
• Details (optional): abstract, number of claims, the first claim, legal status (e.g. Active, Expired), expected expiry, application number, CPC codes, and how many documents it cites and how many cite it.
• Patent number lookups with full details, written any way: US 11,923,482 B2 works, design (USD…) and reissue (USRE…) numbers too.
• Up to 1,000 patents per search.

Example output row

A real row with details (long texts shortened here):

{
  "search": "solid state battery",
  "rank": 1,
  "publication_number": "WO2013104046A1",
  "country": "WO",
  "title": "A system and method for assuring operational readiness of a mission critical battery having a long storage period",
  "snippet": "A SYSTEM AND METHOD FOR ASSURING OPERATIONAL READINESS OF A MISSION CRITICAL BATTERY HAVING A LONG STORAGE PERIOD Technical Field This invention relates to the field of batteries designed for very lon …",
  "assignee": "Panacis Inc.",
  "priority_date": "2012-01-09",
  "filing_date": "2012-12-19",
  "publication_date": "2013-07-18",
  "grant_date": null,
  "language": "en",
  "url": "https://patents.google.com/patent/WO2013104046A1/en",
  "pdf_url": "https://patentimages.storage.googleapis.com/4f/16/c5/b5bc207e6ec556/WO2013104046A1.pdf",
  "total_results": 107678,
  "abstract": null,
  "claims_count": 10,
  "first_claim": "A system for assuring operational readiness of a mission critical battery in a stored device, said mission critical battery having a long storage period, said system comprising: a. a primary charging battery for storing an electrical charge connected to; b. a charging control circuit disposed between said primary charging battery and; c. connected to the mission critical battery, wherein the missi …",
  "legal_status": "Ceased",
  "expiration_date": null,
  "application_number": "PCT/CA2012/050916",
  "cpc_codes": [
    "H01M10/00",
    "H01M10/42",
    "H01M10/46",
    "G01R31/00",
    "G01R31/36",
    "G01R31/382",
    "H01M16/00",
    "H01M6/00",
    "H01M6/50",
    "H01M6/5033",
    "H02J7/00",
    "H02J7/34",
    "H02J7/342",
    "H01M10/48",
    "H01M6/30",
    "Y02E60/00",
    "Y02E60/10"
  ],
  "cites_count": 20,
  "cited_by_count": 21
}

Pricing

Pay per event, no subscription:

• $1 per 1,000 patents from a search ($0.001 each).
• $3 per 1,000 detailed patents ($0.003 each, instead of the plain price) when details are on, and for patent number lookups. If a patent page cannot be read, the row costs the plain price.
• $0.001 per run start.

Examples: the pre-filled search (20 patents) costs $0.021. 1,000 patents cost about $1. 100 detailed patents cost about $0.30. Searches with no result and error rows are never charged.

Input

Field	What it does
searches	Keywords, one search per line.
assignees	Optional companies. On their own, they list a company's patents.
maxResultsPerSearch	Up to 1,000. Default 20.
includeDetails	Abstract, claims, legal status, expiry, CPC codes, citations.
countries	Patent office codes, e.g. US, EP, WO.
dateFrom, dateTo	Priority date range.
status	any, grant or application.
sort	relevance, newest or oldest.
patentNumbers	Direct lookups, always with details.

Good to know

• Inventor names are left out on purpose: they are private persons. Assignees (owners) are included.
• Google Patents is read politely, one request per second: 1,000 patents from a search take about 10 seconds, 1,000 detailed patents about 20 minutes. If Google slows a very large run down, everything delivered until then stays in the results and the run says so.
• The same patent found by two searches is delivered and charged once.
• Abstracts of patents from China, Japan and other offices come in Google's English translation. Some publications, such as many WO applications, have no abstract on Google Patents.
• Legal status and expiry are Google's estimates, not legal advice.
• Not affiliated with Google.

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