China CNIPA Patent Scraper

Scrape Chinese patent data from Google Patents. Search by keyword, IPC/CPC classification code, assignee name, or date range. Returns bilingual (Chinese + English) patent records with full bibliographic data.

What it does

Two operating modes:

Search mode (default): Queries Google Patents for Chinese patents using the provided keyword, classification code, or assignee name. Pages through results and fetches each patent's detail page.

Direct URL mode: Provide specific Google Patents URLs (e.g. https://patents.google.com/patent/CN115982415A/en) and the actor scrapes only those patents, skipping the search step entirely.

Output fields

Each scraped patent produces one dataset record with 20 fields:

Field	Description
publication_number	CNIPA publication number (e.g. CN114547329B)
application_number	Application number (e.g. CN:202310093204.3A)
title_en	Patent title in English (Google-translated)
abstract_en	Full abstract in English (Google-translated)
abstract_cn	Full abstract in Chinese (original text)
filing_date	Filing date (YYYY-MM-DD)
publication_date	Publication date (YYYY-MM-DD)
grant_date	Grant date (YYYY-MM-DD), empty if not yet granted
priority_date	Priority date (YYYY-MM-DD)
status	Legal status (Pending, Active, Expired, etc.)
inventors_cn	Inventors in Chinese characters, comma-separated
assignees_en	Current assignees in English, comma-separated
assignees_cn	Original assignees in Chinese, comma-separated
cpc_codes	CPC classification codes, comma-separated (leaf codes only)
ipc_codes	IPC classification codes, comma-separated
legal_events	Legal event timeline as JSON string
family_members	Patent family members, comma-separated
pdf_url	URL to patent PDF
google_patents_url	Google Patents detail page URL
scraped_at	ISO timestamp of when the record was scraped

Input parameters

Parameter	Type	Required	Description
maxItems	integer	Yes	Maximum patents to scrape (default: 10, Google Patents caps at 1,000 per query)
query	string	No	Search keywords, IPC/CPC codes, or assignee name. Examples: battery electric vehicle, H04L, Huawei
dateFrom	string	No	Filter patents filed on or after this date (YYYY-MM-DD)
dateTo	string	No	Filter patents filed on or before this date (YYYY-MM-DD)
startUrls	array	No	Direct Google Patents URLs to scrape. When provided, skips search entirely

Example inputs

Search by keyword with date range:

{
  "query": "artificial intelligence medical",
  "dateFrom": "2022-01-01",
  "dateTo": "2024-12-31",
  "maxItems": 50
}

Search by IPC classification code:

{
  "query": "H04L",
  "maxItems": 100
}

Search by assignee:

{
  "query": "Huawei",
  "maxItems": 200
}

Direct URL mode:

{
  "startUrls": [
    "https://patents.google.com/patent/CN115982415A/en",
    "https://patents.google.com/patent/CN108081978B/en"
  ],
  "maxItems": 2
}

Example output

{
  "publication_number": "CN115982415A",
  "application_number": "CN:202310093204.3A",
  "title_en": "Incremental graph division method, device, equipment, medium and product",
  "abstract_en": "The application discloses an incremental graph division method...",
  "abstract_cn": "本申请公开了一种增量图划分方法、装置、设备、介质及产品...",
  "filing_date": "2023-02-06",
  "publication_date": "2023-04-18",
  "grant_date": "",
  "priority_date": "2023-02-06",
  "status": "",
  "inventors_cn": "汤韬, 高鹏飞, 孙权, 潘婧, 赵金涛, 郑建宾, 艾博轩, 庞悦",
  "assignees_en": "China Unionpay Co Ltd",
  "assignees_cn": "China Unionpay Co Ltd",
  "cpc_codes": "G06F16/174, G06F16/901, G06F16/9536, G06Q50/00, Y02D10/00",
  "ipc_codes": "",
  "legal_events": "[{\"date\":\"2023-02-06\",\"title\":\"Application filed by China Unionpay Co Ltd\",\"type\":\"filed\"},...]",
  "family_members": "CN115982415A, WO2024164667A1, ...",
  "pdf_url": "https://patentimages.storage.googleapis.com/64/48/49/800ddc17fec1fc/CN115982415A.pdf",
  "google_patents_url": "https://patents.google.com/patent/CN115982415A/en",
  "scraped_at": "2026-05-11T04:22:20.537Z"
}

Notes

• Google Patents caps search results at 1,000 patents per query. Use dateFrom/dateTo to narrow large result sets.
• The search API returns patents sorted by Google's relevance ranking. Results are not guaranteed to be exhaustive.
• Chinese abstracts (abstract_cn) are extracted when available in the original-language source text. Not all patents have the original Chinese text displayed.
• Legal events are returned as a JSON string containing an array of {date, title, type} objects.
• Family members include all patent numbers in the global patent family (not limited to CN).