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    • Enriched Citation API (Version 1)

    Metadata Updated: September 30, 2025

    The Enriched Citation API provides the Intellectual Property 5 (IP5 - EPO, JPO, KIPO, CNIPA, and USPTO) and the Public with greater insight into the patent evaluation process. It allows users to quickly view information about which references, or prior art, were cited in specific patent application Office Actions, including: bibliographic information of the reference, the claims that the prior art was cited against, and the relevant sections that the examiner relied upon. The API allows for daily refresh and retrieval of enrich citation data from Office Actions mailed from October 1, 2017 to 30 days prior to the current date.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    References

    https://developer.uspto.gov/ds-api-docs/index.html?url=https%3A//developer.uspto.gov/ds-api/swagger/docs/enriched_cited_reference_metadata.json

    Dates

    Metadata Created Date July 15, 2022
    Metadata Updated Date September 30, 2025
    Data Update Frequency R/P1D

    Metadata Source

    Harvested from Commerce Non Spatial Data.json Harvest Source

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 15, 2022
    Metadata Updated Date September 30, 2025
    Publisher Open Data Portal Team
    Maintainer
    Identifier ODP-ENR-CIT-API-v1
    Data First Published 2019-04-12
    Language en-US
    Data Last Modified 2025-08-28
    Primary IT Investment UII
    Category uspto, ip5, enriched, citation, prior art, office action, claims, machine learning, ai, statutes, references, api
    Public Access Level public
    Accesslevelcomment
    Accessurl https://developer.uspto.gov/api-catalog/uspto-enriched-citation-api
    Data Update Frequency R/P1D
    Bureau Code 006:51
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Datadictionary https://developer.uspto.gov/ds-api-docs/index.html?url=https%3A//developer.uspto.gov/ds-api/swagger/docs/enriched_cited_reference_metadata.json
    Data Quality True
    Format api
    Harvest Object Id 4c68a283-83be-49ae-98bf-c0840f042162
    Harvest Source Id bce99b55-29c1-47be-b214-b8e71e9180b1
    Harvest Source Title Commerce Non Spatial Data.json Harvest Source
    Homepage URL https://developer.uspto.gov/api-catalog
    License https://creativecommons.org/publicdomain/mark/1.0
    Mbox data@uspto.gov
    Old Spatial
    Program Code 006:070
    Publisher Hierarchy U.S. Federal Government > Department of Commerce (DOC) > U.S. Patent and Trademark Office (USPTO) > Open Data Portal Team
    Related Documents https://developer.uspto.gov/ds-api-docs/index.html?url=https%3A//developer.uspto.gov/ds-api/swagger/docs/enriched_cited_reference_metadata.json
    Source Datajson Identifier True
    Source Hash 2fd0aaad4042f8960a16933bef505f062405e8488f7f12fc9c5b36afa8d199ab
    Source Schema Version 1.1
    Spatial
    System of Records
    Temporal 2017-10-01/2025-12-31
    Webservice https://developer.uspto.gov/api-catalog/uspto-enriched-citation-api

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