Below is one search strategy to count the number of US pharmaceutical patents
which have a thousand or more compounds described.
HCAPLUS
Use HCAPLUS to omit search term charges. However, this search demands much
system resources, so the search will take some time.
L1 S US/PC AND A61K?/IC (US pharmaceutical patents)
(L1 will have to be limited to much smaller sets, maybe less than 5000
patents each, to accomodate system limits with the transfer command:)
L2 TRA L1 RN 1- /IT (search US pharm patent RN's in the IT field to create
countable hits)
[L3 SEA L2/IT] (L3 created by transfer command)
L4 S L1 AND L3 (US pharmaceutical patents with RN search hits in the IT
field)
L4 SORT L4 1- OCC (all search fields wil be ordered, but will be ordered
reverse numerically by IT field hit
(number of RN's), as these will be the highest numbers)
D OCC (PI, IC, IT fields displayed. Number in IT field=number of RN's)
Display random answer numbers from the sorted occurrence list L4, to find where
in the L number set 1000 occurences of RN's in the IT field occur. e.g., D L4
OCC 1, 1000, 2000, 3000
Do this until the higest number near 1000 is found. This answer number will
then be equal to the number of US pharmaceutical patents which describe 1000 or
more unique compounds (in Chemical Abstracts).
Patent numbers could be extracted from the PI field in the subset of L4
identified to have greater than 1000 RN's, to identify those actual patents.
Out of interest, I wanted to run the search for the year 2000. System limits
were exceeded for this set of 7429 patents however. In searching a small set,
only new patents by just my company, I found that the strategy does work to sort
answers by number of registry numbers.
Damian
Damian Hayden
Chiron Corp
dhayden@cc.chiron.com
____________________Reply Separator____________________
Subject: FWD: help for strategy
Author: "Bill Murray" <billmurray2@hotmail.com>
Date: 7/24/00 6:16 PM
Non-member submission from [Fiorella.Cristaldi@am.pnu.com]
Does anyone know how to find out some pharmaceutical US patents
specifically claiming and listing/naming thousand of compounds?
I'm interested either in strategies to be used on CAPLUS/STN and on
internet sites like USPTO, IBM, ect
I'm not interested in claims covering libraries of componds.
Your help would be greatly appreciated. Thanks in advance
Fiorella Cristaldi
Chemical & Patent information specialist
Pharmacia
Nerviano, Italy
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