Different search results

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Tobias Viskers

• August 23, 2024 13:47

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

 

 

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  James Whitton

  • August 23, 2024 14:42

  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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  Tobias Viskers

  • August 26, 2024 07:02

  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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  James Whitton

  • August 28, 2024 23:07

  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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