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IPC Main Group
C09C 3/00

Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
Subclass:
TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; PREPARATION OF CARBON BLACK

Filing statistics

IPC C09C 3/00 belongs to the parent subclass C09C, which recorded 23,000 patent applications worldwide between 2013 and 2023. Annual filings declined from 2,433 in 2013 to 1,531 in 2023 (-37%), peaking at 2,476 applications in 2014. The most active applicants in class C09 are LG CHEM (6,420 applications), NITTO DENKO CORPORATION (5,752 applications) and HALLIBURTON ENERGY SERVICES GROUP (5,650 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

improving FILLERSimproving PIGMENTS

5 direct subcodes

Child Classifications

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  • C09C 3/04 Physical treatment, e.g. grinding or treatment with ultrasonic vibrations
  • C09C 3/06 Treatment with inorganic compounds
  • C09C 3/08 Treatment with low-molecular-weight organic compounds
  • C09C 3/1 Treatment with macromolecular organic compounds
  • C09C 3/12 Treatment with organosilicon compounds

Top Applicants

Top 10 applicants by patent filingsfor 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