IFIREF (IFI Uniterm and U.S. Class Reference File)
SubjectCoverage

IFIREF contains indexing UNITERMS and USPTO Classifications for U.S. patents in thefollowing subject areas:• Aerospace and Aeronautical• Electrical and Electronics EngineeringEngineering• Electromagnetic Technology• Agricultural Engineering• Mechanical Engineering• Biomedical Technology• Medicine• Chemical Engineering• Nuclear Science• Chemistry• Telecommunications• Civil Engineering

File Type

DirectoryFeatures

Thesaurus

Three thesauri are available: Controlled Terms (/CT), Fragment Code (/FG),and Uniterm (/UN)

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RecordContent• U.S. Patent and Trademark Office (USPTO) classification codes and titles• Authority data for general, fragment, and compound Uniterms.
• Classification records contain U.S. Classifications with their titles, controlled terms, thelevel number of classifications within their hierarchies, and the complete hierarchy.
• General Uniterm records contain Uniterm codes, the associated controlled term text,
used for terms, broader terms, narrower terms, and related terms.
• Compound Uniterm records contain Uniterm codes, molecular formulas, controlledterms, chemical names, and fragment codes with associated text.

File SizeMore than 441,600 records (2/2016)

Coverage

IFI databases

Updates• Classes and index records are reloaded as needed• Uniterms are reloaded as needed

Language

English

Database
Producer

IFI CLAIMS Patent Service,a division of Fairview Research LLC
P.O. Box 1148, Madison, CT 06443
Phone: (203) 779-5301
Fax: (203) 583-4521
Email:info@ificlaims.com

Sources• USPTO Manual of Classification:• Uniterm Authority Lists• IFI Compound Term Vocabulary®

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User Aids••••••••

PricingEnter HELP COST at an arrow prompt (=>).

February 2016

USPTO Manual of Classification: http://www.uspto.gov/web/patents/classification/
Classification Definitions (available from the producer)
IFI General Term List (available from the producer)
IFI Compound Term List (available from the producer)
IFI Fragment Term List (available from the producer)
IFI Thesaurus of General Terms (available from the producer)
Online Helps (HELP DIRECTORY lists all help messages available)STNGUIDE3IFIREF

Search and Display Field Codes
Fields that allow left and simultaneous left and right truncation (SLART) are indicated with an asterisk(*).
SearchCodeSearch Field Name

DisplayCodes

Search Examples

Basic Index * (contains single words
from the broader (BT), controlled(CT), narrower (NT), related (RT),and used for (UF) terms, chemicalname (CN), fragment codes (FG),national patent classification code(NCL), and uniterms (UN), as well as
molecular formulas (MF))

None(or /BI)S HYDROCARBON#S PHYSICAL PROCESSES
S 008636000
S Al2H8Sr
S "10001"/BI

BT, CN, CT, FG,MF, NCL, NT,RT, UF, UN

Chemical NameControlled Term (1)/CN/CT

CN
CT

Controlled Word/CW

Element Count (2)/ElementSymbols/FS/FW/FG/IPC/LV/MF
/PA
/NCL
/NCLR

S ISODURENE/CN
S 'CARBON, 9-26 (M)'/CT
S CARBON?/CT
S SINGLE BOND?/CWS CARBON?/CW
S 1-4/S AND K>1
S CLASS/FS
S 33-45/FW
S 30036/FG
S A61K/IPC
S 4/LVS ALH4LI/MF
S BP/PAS 002002500/NCL
S 002002000-002064000/NCLR

Not displayed
Not displayedFGIPCLVMF
PANCL
NCL

S 50098/UN

UN

File Segment
Formula Weight (2)Fragment Code (1)International Patent Classification
Level
Molecular Formula
Patent Assignee
US Patent Classification CodeUS Patent Classification
Range Searchable (2)Uniterms (1)/UNCTMF(1) There is a thesaurus associated with this field.
(2) Numeric search field that may be searched with numeric operators or ranges.

Controlled Term (/CT) Thesaurus
A thesaurus is present for the Controlled Term (/CT) field in IFIREF. When you search a code or text term inthis field, the system automatically echoes the code and its definition.
You may also use the thesaurus to find a particular code or its definition. To display code definitions, use theEXPAND command with a code followed by +ALL and the field code. To display the corresponding code, use
EXPAND with text followed by +ALL and the field code.
Only the relationship code +ALL may be used.
Relationship
CodeALL

Content
Code and its definition(SELF, UN, CT)

ExampleS POLYISOBUTYLENE/CT
E 04220+ALL/CT

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Fragment Code (/FG) Thesaurus
A thesaurus is present for the Fragment Code (/FG) field in IFIREF. When you search a code or text term in thisfield, the system automatically echoes the code and its definition.
You may also use the thesaurus to find a particular code or its definition. To display code definitions, use theEXPAND command with a code followed by +ALL and the field code. To display the corresponding code, use
EXPAND with text followed by +ALL and the field code.
Only the relationship code +ALL may be used.
RelationshipCodeALL

ContentCode and its definition(SELF, UN, CT)

ExampleS 30038/FG
E CARBON, 1-8 (M) (STO)+ALL/FG

Uniterm (/UN) Thesaurus
A thesaurus is present for the Uniterm (/UN) field in IFIREF. When you search a code or text term in this field,
the system automatically echoes the code and its definition.
You may also use the thesaurus to find a particular code or its definition. To display code definitions, use theEXPAND command with a code followed by +ALL and the field code. To display the corresponding code, use
EXPAND with text followed by +ALL and the field code.
Only the relationship code +ALL may be used.
Relationship
CodeALLFebruary 2016

Content
Code and its definition(SELF, UN, CT)

ExampleS 51567/UN
E ALUMINUM, CHLORODIETHYL-+ALL/UN

5IFIREFDISPLAY and PRINT Formats
Any combination of formats may be used to display or print answers. Multiple codes must be separated bycommas or spaces, e.g., D L3 1-10 REF RT. The fields are displayed in the order requested.
Hit-term highlighting is available in all fields except AN. Highlighting must be on during SEARCH in order to use
the HIT, KWIC, and OCC display formats.
FormatContentExamples

ANBT
CNCTFG
IPC
LVMF
NCL
NTPA
RTUF
UN

Accession Number
Broader Term
Chemical NameControlled Term
Fragment CodeInternational Patent Classification
Level
Molecular Formula
US Patent Classification CodeNarrower Term
Patent Assignee
Related Term
Used For Term
Uniterms

D L4 5 AN
D BT 1-3
D L2 1,5 CN
D CT L4 1-10
D 1, 4-5 FG L3
D IPC
D LV
D MF 3,6 8-9
D L2 NCL
D 1-5 NT L4
D PA
D 1-5 L4 RT
D L4 UF 1-5
D UN L4 1-5

ALLClassification: AN, NCL, LV, CT, hierarchy display
Compound: AN, UN, MF, CT, CN, FG
Fragment: AN, UN, FG, CT
General: AN, UN, CT, UF, BT, NT, RT
Classification: AN, NCL, LV, CT
Compound: AN, UN, MF, CT
Fragment: AN, UN, FG, CT
General: AN, UN, CT (REF is the default)

D 1 7 ALL

Fields containing hit terms
Hit terms plus 20 words on either side (KeyWord-In-Context)
Number of occurrences of hit terms and fields in which they occur

D HIT 1,3,10
D KWIC NOH
D OCC

REF

HITKWICOCC (1)D 2-7 REF

(1) No online display fee for this format.

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SELECT, ANALYZE, and SORT Fields
The SELECT command is used to create E-numbers containing terms taken from the specified field in ananswer set.
The ANALYZE command is used to create an L-number containing terms taken from the specified field in ananswer set.
The SORT command is used to rearrange the search results in either alphabetic or numeric order of thespecified field(s).
Field Name
Accession NumberBroader Term
Chemical NameControlled Term
Fragment CodeInternational Patent Classification
Level
Molecular Formula
Narrower Term
Patent Assignee
Related TermUniterm CodeUS Patent Classification CodeUsed For TermField CodeANBT
CNCT
FGIPC
LVMF
NTPARTUNNCLUF

ANALYZE/SELECT (1)

SORT

Y (2)
Y (3)
Y
Y (default)
Y
YYYY (3)Y
Y (3)YY
YNNYYNYNNN
YNYYN(1) HIT may be used to restrict terms extracted to terms that match the search expression used to create the answer set, e.g., SEL HIT CN.
(2) SELECT HIT and ANALYZE HIT are not valid with this field.
(3) Appends /BI to the terms created by SELECT.

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Sample Records
EXPAND in /CT Thesaurus=> E POLYISOBUTYLENE+ALL/CT
E11-->POLYISOBUTYLENE/CT
UN
04220********* END *********EXPAND in /UN Thesaurus=> E 04220+ALL/UN
E11-->
04220/UNCT
POLYISOBUTYLENE********* END *********SEARCH in /FG=> S 30038/FG
30038 CARBON
L42 30038/FG
DISPLAY ALL (Classification)
AN 3004148 IFIREF
NCL 019056000
LV 6CT With boll hullers
019000000
1 TEXTILES: FIBER PREPARATION
019001000
2 LIBERATING
019039000
3 Ginning019048000R
4 Gins019055000R
5 Saw
019056000
6 With boll hullers
DISPLAY ALL (Compound)AN
79288 IFIREF
UN
50098
MF
C10H14CT
BENZENE, 1,2,3,5-TETRAMETHYLNOTE New Term 1951 (Approx.)
DBN Uniterm
CN
ISODURENETETRAMETHYLBENZENE/1,2,3,5-/
DISPLAY ALL (General)AN
188011 IFIREF
UN
03981
CT
PETROLEUM SULFONATESNOTE Roles – New Term 1950 (Approx.)
Also search Petroleum and Sulfonic Acids, Sul-Fonates/STO/.
Also covered by collection term: HYDROCARBON FRACTION/CT/.
DBN Uniterm
UFAMMONIUM PETROLEUM SULFONATES; BARIUM SULFONATES; CALCIUM SULFONATES;MAHOGANY PETROLEUM SULFONATES; METAL PETROLEUM SULFONATES; SODIUM PETROLEUM SULFONATEIn North America
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February 2016