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Overview of the currently available Y04S (Smart Grid) codes
The Y-tags are updated by running search algorithms designed by expert examiners, i.e. they depend on other classes.
On 01 January 2013, the EPO and USPTO jointly launched the
Cooperative Patent Classification (CPC), replacing the European Patent
Classification (ECLA) and other codes that were used in the search algorithms
to allocate the Y02 and Y04S tags. Due
to the CPC and related IT changes, the search algorithms and associated update
processes have been revised. These
changes will also allow us to update the Y-codes with a higher frequency in
The current update status is as follows:
|Y02B (Buildings and appliances)||July 2014
|Y02C (Capture and storage of greenhouse gases)||July 2014
|Y02E (production, distribution and transport of energy)||July 2014
|Y02T (transportation)||July 2014
|Y04S (smart grids)||July 2014|