DIFF Subgroup
F21V 3/06 characterised by the material
Introduced: January 2018
Full Title
Full titles differ between systems:
IPC:
Globes; Bowls; Cover glasses > characterised by materials, surface treatments or coatings > characterised by the material
CPC:
Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506) > characterised by materials, surface treatments or coatings > characterised by the material
CPC subdivides this area 4x more granularly than IPC with 3 additional codes.
3 codes are CPC-only extensions.
IPC defines codes here since 2018.
Child Classifications
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- F21V 3/08 the material comprising photoluminescent substances since 2018 IPC+CPC Available in IPC and CPC