The EPO has a 'Y' classification in its IPC database. A search on this code on Espacenet reveals numerous patents have been allocated this IPC code. See for instance: https://worldwide.espacenet.com/patent/ ... 2F10%2Flow
Which relates to Y02E 10/00.
However, if I attempt the same search in PatStat (SELECT COUNT(*) FROM [patstat2021a].[dbo].[tls209_appln_ipc] WHERE ipc_class_symbol LIKE 'Y%'), I get zero results.
The same search works fine for G06, for instance.
Any ideas?
IPC 'Y' classification
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Re: IPC 'Y' classification
Hello AWFB,
your PATSTAT search is searching the CPC classification scheme, not IPC.
If you change it to CPC, you will the results.
In ESPACENET you will find 4 results which are basically some kind of data errors.
We will correct that because the correct result should indeed be zero results, like you find in PATSTAT.
https://worldwide.espacenet.com/patent/ ... %20%22Y%22
your PATSTAT search is searching the CPC classification scheme, not IPC.
If you change it to CPC, you will the results.
In ESPACENET you will find 4 results which are basically some kind of data errors.
We will correct that because the correct result should indeed be zero results, like you find in PATSTAT.
https://worldwide.espacenet.com/patent/ ... %20%22Y%22
PATSTAT Support Team
EPO - Vienna
patstat @ epo.org
EPO - Vienna
patstat @ epo.org