Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • Enriched Citation API (Version 2)

    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/v2

    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-v2
    Data First Published 2020-10-22
    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-v2
    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/v2
    Data Quality True
    Format api
    Harvest Object Id 2f27730b-6b0c-49fa-ae56-f2f2af04e08a
    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/v2
    Source Datajson Identifier True
    Source Hash 19ab76a96521ed5e20a68e27398ef0cd284c2600604f3d5f816c12c4bf95efe6
    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-v2

    Didn't find what you're looking for? Suggest a dataset here.