Guide to STN Patent Databases – Basic Version - Paton - TU Ilmenau

Types of search
If a proximity operator was entered the computer will not recognize the stop words:
=> S UNWANTED(W)BY(W)PRODUCT#
11425 UNWANTED
0 BY
2185880 PRODUCT#
L2 0 UNWANTED(W)BY(W)PRODUCT#
Thus, using proximity operators the extra space for the stop word must be considered:
=> S UNWANTED(1W)PRODUCT#
11425 UNWANTED
2185880 PRODUCT#
L3 208 UNWANTED(1W)PRODUCT#
=> D 7 12 KWIC=5
L3 ANSWER 7 OF 208 HCAPLUS COPYRIGHT 2006 ACS on STN
AB Endotoxin is an unwanted by product of recombinant
proteins purified from. . .
L3 ANSWER 12 OF 208 HCAPLUS COPYRIGHT 2006 ACS on STN
AB . . . 1,3-BDSA is more complicated with unwanted
products such as SO2 and benzene. . .
In EPFULL (and other files) stop words do not exist:
=> FILE EPFULL
=> S UNWANTED BY PRODUCT#
2458 UNWANTED
834345 BY
100593 PRODUCT#
L12 9 UNWANTED BY PRODUCT#
(UNWANTED(W)BY(W)PRODUCT#)
-
In the table below it is shown how a list of stop words can be displayed in each of the databases.
Database Stop words Online Help Standard Fields in /BI
CAPLUS Yes ? content CA TI, ST, IT, CT, CW, AB
DWPI No
EPFULL No
IFIPAT Yes ? content CA TI, AB, CLM, GOVI, RN
INPADOCDB /
INPAFAMDB
No
JAPIO Yes ? content CA TI, CT, AB
PATDPA No
PATDPAFULL No
PCTFULL No
RDISCLOSURE No
USPATFULL/
USPAT2
Yes ? stopwords USPATFULL TI, CLM, DETD, SUMM, DRWD, AB, PARN, GOVI
Changed text substances (e.g. introduction of abstracts from a certain date) may have an influence on search
results. For the time after the introduction of a new text substance the number of hits of a text search may be
considerably higher. This should particularly be taken into account when performing statistical analyses as the
search result is more complete for the documents having the new text substance. In turn, with the same search
strategy the search result will be less complete for earlier documents not having the extra text substance.
In some databases (in particular those following the dynamical principle) text substances may be added to already
existing documents. This must be considered when doing a current awareness search. There exist update fields to
take this into account (cf. Monitoring patents ).
Abbreviations. In some databases, such as World Patents Index and Chemical Abstracts, where the text substances
(Title, Abstract, Index terms) are edited by the database producer, there are abbreviation lists for abbreviations
often used in the documents. These abbreviations must be considered in a search, the result otherwise being
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