by optical means

Introduced: January 2024

Full Title

Full titles differ between systems:

IPC:

Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials > Investigating particle size or size distribution > by optical means

CPC:

Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials > Investigating particle size or size distribution (by measuring osmotic pressure G01N7/10; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10) > by optical means

CPC subdivides this area 5x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

Note: 3 CPC extensions are marked as secondary classification only.

IPC defines codes here since 2024.

Child Classifications

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G01N 15/0211 +2 CPC CPC only CPC only
G01N 15/0227 using imaging; using holography since 2024 +1 CPC IPC+CPC Available in IPC and CPC
G01N 2015/0238 2nd only CPC only CPC only
G01N 2015/0244 2nd only CPC only CPC only
G01N 2015/025 2nd only CPC only CPC only