Disappearing CPC classifications

[Bradford]

These classifications seem to have disappeared from the CPC:-

Y02E30/12 • • Magnetic plasma confinement
Y02E30/122 • • • Tokamaks
Y02E30/124 • • • Stellarators
Y02E30/126 • • • Other reactors with magnetic plasma confinement
Y02E30/128 • • • First wall, divertor, blanket
Y02E30/14 • • Inertial plasma confinement
Y02E30/16 • • • Injection systems and targets
Y02E30/18 • • Low temperature fusion, e.g. "cold fusion"

What was the reason for this?

[EPO / PATSTAT Support]

Hello Bradford,

kindly have a look at this forum post which provides some insights on the changes in the CPC scheme.
The only way to further drill down into the regrouped CPC tags is to use the (non -y-tag) CPC codes and/or IPC codes in combination with keywords.
revision-and-changes-on-the-cpc-y-tags-9419

[Bradford]

Many thanks for this explanation!