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DIFF Subgroup
C09K 5/08

Materials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence)

Introduced: January 2000

Title

Titles differ between systems:

IPC: Materials not undergoing a change of physical state when used

CPC: Materials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence)

Full Title

Full titles differ between systems:

IPC:

Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion > Materials not undergoing a change of physical state when used

CPC:

Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion > Materials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence)

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 2000.

Child Classifications

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  • C09K 5/14 Solid materials, e.g. powdery or granular since 2000 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C09,2013–2023, worldwide · Source: EPO PATSTAT

  1. LG CHEM KR 6,420
  2. NITTO DENKO CORPORATION JP 5,752
  3. HALLIBURTON ENERGY SERVICES GROUP US 5,650
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 5,635
  5. DOW GLOBAL TECHNOLOGIES US 4,844
  6. MERCK PATENT DE 4,779
  7. CHINESE ACADEMY OF SCIENCES 4,311
  8. FUJIFILM JP 4,205
  9. BASF (BADISCHE ANILIN & SODA FABRIK) DE 4,039
  10. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,931

Top Applicants (CPC)

Class C09,2013–2023, worldwide · Source: EPO PATSTAT

  1. LG CHEM KR 7,954
  2. HALLIBURTON ENERGY SERVICES GROUP US 6,584
  3. NITTO DENKO CORPORATION JP 6,500
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
  5. DOW GLOBAL TECHNOLOGIES US 6,324
  6. FUJIFILM JP 5,832
  7. MERCK PATENT DE 5,481
  8. BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
  9. SAMSUNG DISPLAY KR 5,105
  10. NITTO DENKO CORPORATION 3,584