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DIFF Subgroup
C25B 1/16

Hydroxides (by simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine C25B1/34)

Introduced: July 1974

Title

Titles differ between systems:

IPC: Hydroxides

CPC: Hydroxides (by simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine C25B1/34)

Full Title

Full titles differ between systems:

IPC:

Electrolytic production of inorganic compounds or non-metals > Products > Alkali metal compounds > Hydroxides

CPC:

Electrolytic production of inorganic compounds or non-metals > Products > Alkali metal compounds > Hydroxides (by simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine C25B1/34)

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class C25,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,797
  2. EBARA CORPORATION JP 729
  3. CENTRAL SOUTH UNIVERSITY 650
  4. INDUSTRIE DE NORA IT 641
  5. ROBERT BOSCH DE 600
  6. JFE STEEL JP 593
  7. KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 553
  8. SIEMENS DE 536
  9. CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 525
  10. JX NIPPON MINING & METALS CORPORATION 499

Top Applicants (CPC)

Class C25,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,393
  2. JFE STEEL JP 914
  3. EBARA CORPORATION JP 738
  4. INDUSTRIE DE NORA IT 674
  5. JX NIPPON MINING & METALS CORPORATION JP 652
  6. NIPPON STEEL CORPORATION JP 633
  7. CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 630
  8. ROBERT BOSCH DE 626
  9. SIEMENS DE 587
  10. ATOTECH DEUTSCHLAND DE 561