Page History

country

19

Country The country is represented by a standard 2-character code . See based on WIPO ST.3.

doc-number

11

doc-number is generally provided in DOCDB-normalized format. An exception to this is made for WO documents, where the doc-number is normalized to YYYYnnnnnn. 
Patent document numbering is a complex subject, and these are some illustrative examples: US: 3732068, RE31783, 5382 (plant), D436240 (design), EP: 0129539, WO: 1985000002, JP: 60000013, 2006000022, DE: 3244404.
For a complete discussion of document numbers over time and over multiple authorities, please see: Number format concordance - publication numbers at 
https://www.epo.org/searching-for-patents/helpful-resources/data/tables/regular.html.

kind

13

The kind code is used to designate the publication stage of the document, including whether it is a published application or a granted patent. See ST.16.

date

14

Date of publication (YYYYMMDD)

lang

12

Language of publication, 2-character code based on ISO 639-2. The default value is "XX" if no language information is provided by the data sources.