/api/v1/patent/us_patent_citation/

Upstream view USPatentCitationList (index us_patent_citations, response key us_patent_citations). Any field may be null where the bulk data has no value. Default fields (f): patent_id, citation_patent_id, citation_date. Default sort (s): [{"patent_id": "asc"}]. Default options (o): {"pad_patent_id": false}. When the build in service does not carry this endpoint's data set it answers 501 with X-Status-Reason-Code ERR_NOT_IMPLEMENTED and X-Status-Reason naming the data set.

Routes: GET POST /api/v1/patent/us_patent_citation/ GET POST /api/v1/patent/us_patent_citation/{pk}/
Response key: us_patent_citations
Default f: patent_id, citation_patent_id, citation_date
Default s: [{"patent_id": "asc"}]
Default o: {"pad_patent_id": false}
q: required on the list route
Detail key: patent_id in the path; a "/" in a key is written ":"

Example

curl -s -G -H "X-Api-Key: $KEY" https://patentref.io/api/v1/patent/us_patent_citation/ \
  --data-urlencode 'q={"citation_patent_id": "7861317"}'

import json, os, requests

base_url = "https://patentref.io"
headers = {"X-Api-Key": os.environ["PATENTREF_KEY"]}
params = {"q": {"citation_patent_id": "7861317"}}
r = requests.get(base_url + "/api/v1/patent/us_patent_citation/", headers=headers,
                 params={k: json.dumps(v) for k, v in params.items()})
r.raise_for_status()
data = r.json()
print(data["total_hits"], data["us_patent_citations"][:3])

Fields

Kind is how q treats the field (grammar, Field kinds). Sortable fields go in s. Nested fields are named with a dot in q and f; naming the group returns its upstream fields, and a field whose note says it is present only when f names it comes back only then. The rows of a group come in the order of their source (grammar, the response and paging).

Field	Type	Kind	Sortable	Note
`patent_id`	string	keyword	yes
`patent`	string (URL)	keyword		Link to the detail record: https://patentref.io/api/v1/patent/<id>/, with a "/" in the id written ":"; null when the id is null. Kind: keyword: in q this name matches the id behind the link (for example "H01" for cpc_current.cpc_class), not the URL.
`citation_sequence`	integer	number	yes
`citation_patent_id`	string	keyword	yes
`citation_patent`	string (URL)	keyword		Link to the detail record: https://patentref.io/api/v1/patent/<id>/, with a "/" in the id written ":"; null when the id is null. Kind: keyword: in q this name matches the id behind the link (for example "H01" for cpc_current.cpc_class), not the URL.
`citation_wipo_kind`	string	keyword	yes
`citation_category`	string	keyword	yes
`citation_date`	string	date	yes
`citation_name`	string	keyword	yes

Machine-readable: this page's data as JSON, and the operation in openapi.json (operationId USPatentCitationList).