Different search results

Tobias Viskers

Why do I get different search results from the following search strings:

(CPC:(Y02C20/40)) and ((CPC:B01D53/14 or IPC:B01D53/14))  5697 families

IPC_CPC:(Y02C20/40 and B01D53/14) 3944 families

 

 

Comments

3 comments

Date Votes
  • Comment author
    James Whitton The chief of community conversations. Community manager

    Hi Tobias,

    The 2nd query here is a subset of the 1st and this is because the way the IPC_CPC syntax works.

    For the IPC_CPC syntax, when you combine 2 codes with the "AND" operator then both those codes have to be present in either the IPC or CPC field for a patent.

    If I use Expert Search to see which patents from the 2nd query don't match the 1st, you can see an example below of one of these patents.

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  • Comment author
    Tobias Viskers

    Hello James,

    Thanks for this. It was as I suspected, but that can't be entirely true after all. Because if I use the query (in expert mode) IPC_CPC:(Y02C20/40 and B01D53/14) I get several documents with CPC code Y02C20/40 and IPC B01D53/14.

    E.G.:

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  • Comment author
    James Whitton The chief of community conversations. Community manager

    Hi Tobias,

    No worries at all.

    In this case, Y02C20/40 and B01D53/14(93) are CPC codes for this patent. Do you have an example where this is also not the case?

    I will be happy to raise this with our data team if so.

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