 <publication-reference fvid="71329085" ucid="US-5551212-A" entity-status="large">
   <document-id>
     <country>US</country>
     <doc-number>5551212</doc-number>
     <kind>A</kind>
     <date>19960903</date>
     <lang>EN</lang>
   </document-id>
 </publication-reference>

Attribute	Description

Attribute	Description
fvid	Unique database-level integer identifier
ucid	See Common XML Attributes
entity-status	Description of filing entity based on number of employees (US only). Values include:

publication-reference/document-id

Element	INID	Description

Element

INID

Description

country

19

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

doc-number

11

doc-number is generally provided in DOCDB-normalized format. Exceptions include WO documents, where the doc-number is normalized to YYYYnnnnnn, US pre-granted documents where the doc-number is normalized to YYYYnnnnnnn, and AU publication numbers, which are provided in the 10-digit AUSPAT format if they differ from the DOCDB numbers. For example, the DOCDB number 5556701 will be converted to 2001255567 (YYYYnnnnnn). We also recommend checking the Content Notifications for patent number or kind code changes.
Patent document numbering is a complex subject, as the examples below illustrate:

Patent Authority	Patent Number
US	3732068
	RE31783
US (Plant)	5382
US (Design)	D436240
EP	0129539
WO	1985000002
JP	60000013
	2006000022
DE	3244404

For a complete discussion of document numbers over time and over multiple authorities, 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.

Note that some documents (utility models, reissued patents, etc.) contain non-standard kind codes used by various patent-granting authorities. See the Kind Code Concordance List for a list of many of the kind codes corresponding to the different publication stages of a patent application.

date

14

Date of publication (YYYYMMDD)
Note: If no date is present and a document-id element exists, a default value of 00010101 (which may appear as 10101) or 19000101 is inserted. The 00010101 date is available in Solr responses only and is not present in the XML.

lang

12

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

Further Reading

For information about the Solr search fields associated with this container, see Publication Information.