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IPC Subgroup
C01F 7/447

by wet processes

Introduced: January 2022

Full Title

Compounds of aluminium > Aluminium oxide; Aluminium hydroxide; Aluminates > Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water > by wet processes

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
INORGANIC CHEMISTRY
Subclass:
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE EARTH METALS

1 direct subcode

Child Classifications

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  • C01F 7/448 using superatmospheric pressure, e.g. hydrothermal conversion of gibbsite into boehmite

Top Applicants

Top 10 applicants by patent filingsfor class C01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 5,794
  2. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,286
  3. LG CHEM KR 2,689
  4. BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,669
  5. CENTRAL SOUTH UNIVERSITY 1,531
  6. KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 1,252
  7. SUMITOMO METAL MINING COMPANY JP 1,073
  8. ZHEJIANG UNIVERSITY 1,061
  9. PANASONIC INTELLECTUAL PROPERTY JP 1,058
  10. PANASONIC INTELLECTUAL PROPERTY 1,038