technical-data/classification-ipc

<classification-ipc>
  <edition>7</edition>
  <main-classification mxw-id="PCL163366969" load-source="docdb">C04B  28/14</main-classification>
  <further-classification mxw-id="PCL163294003" load-source="docdb">C09K   3/18</further-classification>
  <additional-info mxw-id="PCL750202757" load-source="docdb">C04B  38/10</additional-info>
  <linked-indexing-code-group group="J">
    <main-linked-indexing-code mxw-id="PCL163299823" load-source="docdb">C04B  28/14</main-linked-indexing-code>
    <sub-linked-indexing-code mxw-id="PCL1106709533" load-source="docdb">C04B  24:26</sub-linked-indexing-code>
    <sub-linked-indexing-code mxw-id="PCL163417459" load-source="docdb">C04B  24:42</sub-linked-indexing-code>
  </linked-indexing-code-group>
  <linked-indexing-code-group group="K">
    <main-linked-indexing-code mxw-id="PCL1106715491" load-source="docdb">C04B  28/14</main-linked-indexing-code>
    <sub-linked-indexing-code mxw-id="PCL163379057" load-source="docdb">C04B  24:12</sub-linked-indexing-code>
    <sub-linked-indexing-code mxw-id="PCL163388853" load-source="docdb">C04B  24:26</sub-linked-indexing-code>
    <sub-linked-indexing-code mxw-id="PCL163385607" load-source="docdb">C04B  24:42</sub-linked-indexing-code>
  </linked-indexing-code-group>
  <unlinked-indexing-code mxw-id="PCL163364197" load-source="docdb">C04B 111/27</unlinked-indexing-code>
</classification-ipc>

These are the international classifications at the time of publication for documents published before IPCR went into effect (pre-2006).

Element	INID	Description
edition	51	Effective dates: 7: 2000-2006 6: 1995-1999 5: 1990-1994 4: 1985-1989 3: 1980-1984 2: 7/1974-1979 1: 9/1969-6/1974
main-classification	51	Format for all IPC is space-filled to 4-characters at main group: ANNA^^nn/n[...]. See XML example above.
further-classification	51	Further/secondary classification. Same format as `main-classification`.
additional-info	51	Additional information
linked-indexing-code-group	51	Indexing codes are used in association with classification symbols to provide technical information. Their format is similar to classification symbols, but they employ a colon in place of the slash. For example: ANNAnnnn:n[...]. Linked indexing codes show which classification symbols the indexing code is associated with. See Review of the Hybrid Systems in the IPC for more information.
unlinked-indexing-code	51	Unlinked indexing codes are similar to linked indexing codes, but are not linked to an associated classification symbol.
text	51	Not populated

technical-data/classification-ipc/linked-indexing-code-group

Attribute	Description
group	Letter designation that identifies a linked indexing code group

Element	Description
main-linked-indexing-code	Main/primary linked indexing code
sub-linked-indexing-code	Sub/further linked indexing code

technical-data/classifications-ipcr

<classifications-ipcr>
  <classification-ipcr load-source="docdb">E02B 3/12   20060101AFI20100519BHCN</classification-ipcr>
  <classification-ipcr load-source="docdb">E02D 17/20   20100101CLI20100519BHCN</classification-ipcr>
  <classification-ipcr load-source="docdb">E02D 17/20   20060101ALI20100519BHCN</classification-ipcr>
  <classification-ipcr load-source="docdb">E02D 15/00   20060101ALI20100519BHCN</classification-ipcr>
  </classification-ipcr>
</classifications-ipcr>

Element	INID	Description
classification-ipcr	51	International Patent Classification (IPCR) Format is strictly according to WIPO ST. 8. The full list of IPC codes can be found on the WIPO website.

technical-data/classification-locarno

<classification-locarno>
  <main-classification load-source="patent-office">0202</main-classification>
</classification-locarno>

US Design only and those prepared for issue after June 30, 1996 include Locarno International Classification.

Element	INID	Description
edition	51	Edition of the classification schedule
main-classification	51	Format follows CCSS, where CC is the Class (zero-filled) and SS is the subclass (zero-filled)
further-classification	51	Further/secondary classification. Same format as `main-classification`.

technical-data/classification-national

<classification-national country="US">
  <main-classification load-source="patent-office">606041</main-classification>
  <further-classification load-source="patent-office">606001</further-classification>
</classification-national>
<classification-national country="US">
  <text>395/500.05;500.06</text>
</classification-national>
<classification-national country="JP">
  <main-classification load-source="patent-office">C02F 3/02  B</main-classification>
  <further-classification load-source="patent-office">C02F 3/10  A</further-classification>
</classification-national>

Attribute	Description
country	Indicates whether the classification code is based on the USPTO classification (US) or on JAPIO FIndex (JP).

Element	INID	Description
edition	52	Edition of the classification schedule
main-classification	52	The format for all US classes is zero-filled to a 3-character class and 3-character subclass. Characters following those 6 numbers are not zero-filled, and non-significant trailing zeros are removed. There is no punctuation present. Slashes and decimal points can be easily inferred for display purposes. For JP classes, the format is the original delivered from JAPIO.
further-classification	52	Further/secondary classification. Same format as `main-classification`.
additional-info	52	Additional information
linked-indexing-code-group	52	Indexing codes are used in association with classification symbols to provide technical information. Their format is similar to classification symbols, but they employ a colon in place of the slash. For example: ANNAnnnn:n[...]. Linked indexing codes show which classification symbols the indexing code is associated with. See Review of the Hybrid Systems in the IPC for more information.
unlinked-indexing-code	52	Unlinked indexing codes are similar to linked indexing codes, but are not linked to an associated classification symbol.
text	52	In certain data parsing errors, the structure of the classification as delivered in the raw data cannot be established. In these cases, the raw classification data is output in the child: text.

As of 2015, the USPTO has transitioned from using the over 100-year-old U.S. Patent Classification (USPC) system to the Cooperative Patent Classification (CPC), a new classification system jointly developed with the European Patent Office (EPO). The USPTO currently only uses CPC for classifying new utility patent documents; however, it will continue to use U.S. Patent Classification for classifying design and plant patents.

technical-data/f-term-info/f-terms

<f-term-info>
  <f-terms>
    <theme-code>2C088</theme-code>
    <f-term mxw-id="PCL1125233156" load-source="docdb">2C088BA02</f-term>
    <f-term mxw-id="PCL1125234246" load-source="docdb">2C088AA42</f-term>
    <f-term mxw-id="PCL1125236700" load-source="docdb">2C088AA11</f-term>
    <f-term mxw-id="PCL1125252568" load-source="docdb">2C088EB28</f-term>
    <f-term mxw-id="PCL1125261614" load-source="docdb">2C088AA36</f-term>
    <f-term mxw-id="PCL1125276981" load-source="docdb">2C088AA06</f-term>
  </f-terms>
</f-term-info>

Element	INID	Description
theme code	51	5-character alphanumeric code which represents a technical field.
f-term	51	See table below. More information about F-terms can be found at https://www.jpo.go.jp/torikumi_e/searchportal_e/classification.htm.

Characters	Value	Description
1-2	2C	Group of Theme
1-5	2C088	Theme
6-7	AA	Viewpoint
6-9	AA02	F-term
10	A	Additional Code (optional)

technical-data/classifications-cpc

<classifications-cpc>
  <classification-cpc mxw-id="PCL-1437171692" load-source="docdb" scheme="CPC">C12Q 1/6869 20130101 FI20190308BHEP</classification-cpc>
  <classification-cpc mxw-id="PCL-1437187236" load-source="docdb" scheme="CPC">G16B 30/20 20190201 LI20190308BHEP</classification-cpc>
  <classification-cpc mxw-id="PCL-1437187457" load-source="docdb" scheme="CPC">C12Q 1/6827 20130101 LI20190308BHEP</classification-cpc>
  <combination-sets>
    <combination-set group="1" load-source="docdb">
      <classification-cpc rank="1" mxw-id="PCL-1437182516" load-source="docdb" scheme="CPC">C12Q 1/6869 20130101 LI20190308BHEP</classification-cpc>
      <classification-cpc rank="2" mxw-id="PCL-1437183463" load-source="docdb" scheme="CPC">C12Q2535/122 20130101 LA20190308BHEP</classification-cpc>
      <classification-cpc rank="3" mxw-id="PCL-1437166528" load-source="docdb" scheme="CPC">C12Q2537/165 20130101 LA20190308BHEP</classification-cpc>
    </combination-set>
    <combination-set group="2" load-source="docdb">
      <classification-cpc rank="1" mxw-id="PCL-1437169247" load-source="docdb" scheme="CPC">C12Q 1/6827 20130101 LI20190308BHEP</classification-cpc>
      <classification-cpc rank="2" mxw-id="PCL-1437199121" load-source="docdb" scheme="CPC">C12Q2535/122 20130101 LA20190308BHEP</classification-cpc>
      <classification-cpc rank="3" mxw-id="PCL-1437200085" load-source="docdb" scheme="CPC">C12Q2537/165 20130101 LA20190308BHEP</classification-cpc>
    </combination-set>
  </combination-sets>
</classifications-cpc>

Attribute

Description

scheme

Values include:

CPC: symbols that have been allocated to a document by the EPO, discontinued as of week 2019/36
CPCNO: symbols that have been allocated to a document by a national patent office, discontinued as of week 2019/36
CPCI: CPC-International. CPCI is maintained at the family level. When there has been a change to the CPCI picture for a given family, every member in the simple patent family (i.e., all members with the same family ID) will be updated. When different authorities have allocated the same classification symbol, the CPCI picture for one publication will contain duplicate symbols. Duplicate symbols for one publication will be made unique by a two-letter authority-code, which can be found in positions 41-42 in the CPC.

rank

Sequential number used to identify the rank of a symbol within a combination set

Element

INID

Description

classification-cpc

52

Cooperative Patent Classification. Format is according to WIPO ST. 8. For more information on CPC, see Cooperative Patent Classification in IFI CLAIMS Direct. The full list of CPC codes can be found on the CPC website or the USPTO website.

When available, F and L symbols may indicate first and later classifications as in the following example:

<classification-cpc mxw-id="PCL-1583949427" load-source="docdb" scheme="CPC">G01F1/6965 20130101 FI20130101BHEP </classification-cpc> 
<classification-cpc mxw-id="PCL-1583981588" load-source="docdb" scheme="CPC">G01F1/72 20130101 LI20130101BHEP </classification-cpc>

The different elements of CPC codes are described in the following table:

Element	Position in WIPO/ST.8	Description	Values
classification symbol	1	section	A…H and Y
	2,3	class	01…99
	4	subclass	A…Z
	5 to 8	main group	1…9999 right-aligned
	9	separator	/
	10 to 15	subgroup	00…999999
scheme date	20 to 27	version indicator	YYYYMMDD
classification value	30	inventive (equivalent to ECLA) additional (equivalent to ICO or EPO keywords)	I A
action date	31 to 38	date indicating when the code was assigned	YYYYMMDD
classification status	39	original reclassified	B R
data source	40	human machine generated	H M G
generating office	41,42	country code, only present for CPCNO	standard 2-character code based on WIPO ST.3

combination-sets

Group of CPC symbols that have one base class and one or more subsequent ranked symbols that are linked together to convey special classification information.

C-Sets classification is a special classification technique, providing a mechanism for searching combined features that are otherwise not easy to find by single symbols, resulting in more precise and efficient retrieval of technical information from CPC.

A C-Set brings together symbols from different groups within the same subclass or from different subclasses, in a certain order.

The first symbol is designated as the base symbol, and has the Rank 1 in the database.
The second symbol is designated as the subsequent symbol, and has the Rank 2 in the database.
Any further symbol, if present, is also designated as a subsequent symbol, and has the Rank 3 or higher in the database.
At the end of the C-Set is the information value

Example of C-sets presentation in patent documents and in the CPC database:

C05C9/005,	C05D9/02,	C05G3/0058,	INV
Base	Subsequent	Subsequent	Information Value
Rank 1	Rank 2	Rank 3

Source: Guide to CPC (EPO and USPTO)

See https://www.cooperativepatentclassification.org/Training for more information.

technical-data/classifications-cpc/combination-sets/combination-set

Attribute	Description
group	Number used to identify a group of symbols, when allocating a combination set of symbols to a patent document

technical-data/classification-ecla

<classification-ecla>
      <classification-symbol scheme="ICO" mxw-id="PCL684638563">L65D519:00Y1B4</classification-symbol>
      <classification-symbol scheme="ICO" mxw-id="PCL684640847">L65D519:00Y3A1B</classification-symbol>
      <classification-symbol scheme="EC" mxw-id="PCL684643157">B65D 21/02E5</classification-symbol>
      <classification-symbol scheme="EC" mxw-id="PCL935789780">A63B 69/36P2</classification-symbol>
</classification-ecla>

Attribute	Description
scheme	Indicates when the ECLA code is based on the European Classification System (EC) or is an internal EPO classification (ICO=In Computer Only). Other scheme values are IDT (Indeling der Techniek), an old Dutch Patent Classification scheme, and ECNO, which indicates ECLA symbols that have been allocated to a document by a patent examiner who does not work for the EPO.

Element	Description
classification-symbol	ECLA codes assigned by EPO examiners

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technical-data classification

technical-data/classification-ipc