Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials

Introduced: September 1968

Additional Content IPC

particle particles discrete material structure with a representative dimension less than 1 cm and with at least one nearly constant geometrical attribute, like shape, diameter or boundary. Some examples are: biological cells, bubbles or material chips. permeability capacity of a porous material to transmit a fluid porosity fraction of the volume of an apparent solid that is actually empty space porous materials porous material includes microporous materials, as well as film or membrane materials

CPC subdivides this area 3x more granularly than IPC with 9 additional codes.

9 codes are CPC-only extensions.

Note: 9 CPC extensions are marked as secondary classification only.

4 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

G01N 15/01 specially adapted for biological cells, e.g. blood cells (investigating sedimentation of particle suspensions in blood G01N15/05) since 2024 +5 CPC IPC+CPC Available in IPC and CPC
G01N 15/02 Investigating particle size or size distribution (by measuring osmotic pressure G01N7/10; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10) +7 CPC IPC+CPC Available in IPC and CPC
G01N 15/04 Investigating sedimentation of particle suspensions +1 CPC IPC+CPC Available in IPC and CPC
G01N 15/06 Investigating concentration of particle suspensions (by weighing G01N5/00; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10) +8 CPC IPC+CPC Available in IPC and CPC
G01N 15/08 Investigating permeability, pore-volume, or surface area of porous materials +10 CPC IPC+CPC Available in IPC and CPC
G01N 15/10 Investigating individual particles since 1985 +12 CPC IPC+CPC Available in IPC and CPC
G01N 2015/0003 2nd only CPC only CPC only
G01N 2015/0007 2nd only +2 CPC CPC only CPC only
G01N 2015/0019 2nd only CPC only CPC only
G01N 2015/0023 2nd only +3 CPC CPC only CPC only
G01N 2015/0038 2nd only CPC only CPC only
G01N 2015/0042 2nd only +3 CPC CPC only CPC only
G01N 2015/0092 2nd only CPC only CPC only
G01N 2015/0096 2nd only CPC only CPC only
G01N 2015/03 2nd only +1 CPC CPC only CPC only

Top Applicants

Top Applicants (IPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

SGCC(STATE GRID CORPORATION OF CHINA) 41,447
CHINESE ACADEMY OF SCIENCES 32,952
ROBERT BOSCH DE 16,470
SAMSUNG ELECTRONICS COMPANY KR 10,052
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
ZHEJIANG UNIVERSITY 9,529
GUANGDONG POWER GRID CORPORATION 8,615
TSINGHUA UNIVERSITY 7,805
HALLIBURTON ENERGY SERVICES GROUP US 7,796
QUALCOMM US 7,171

Top Applicants (CPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

CHINESE ACADEMY OF SCIENCES 21,460
ROBERT BOSCH DE 17,801
SGCC(STATE GRID CORPORATION OF CHINA) 17,347
SAMSUNG ELECTRONICS COMPANY KR 13,192
QUALCOMM US 9,900
HALLIBURTON ENERGY SERVICES GROUP US 9,742
PHILIPS ELECTRONICS NL 7,249
MITSUBISHI ELECTRIC CORPORATION JP 6,503
ZHEJIANG UNIVERSITY 6,414
DENSO CORPORATION JP 6,382