CPC Subgroup
C09C 3/045 Full Title
Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties > Physical treatment, e.g. grinding or treatment with ultrasonic vibrations
Filing statistics
CPC C09C 3/045 belongs to the parent subclass C09C, which recorded 24,571 patent applications worldwide between 2013 and 2023. Annual filings declined from 2,162 in 2013 to 1,562 in 2023 (-28%), peaking at 2,738 applications in 2016. The most active applicants in class C09 are LG CHEM (7,954 applications), HALLIBURTON ENERGY SERVICES GROUP (6,584 applications) and NITTO DENKO CORPORATION (6,500 applications).
Source: EPO PATSTAT, worldwide filings
Top Applicants
Top 10 applicants by patent filingsfor class C09, 2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 7,954
- HALLIBURTON ENERGY SERVICES GROUP US 6,584
- NITTO DENKO CORPORATION JP 6,500
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
- DOW GLOBAL TECHNOLOGIES US 6,324
- FUJIFILM JP 5,832
- MERCK PATENT DE 5,481
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
- SAMSUNG DISPLAY KR 5,105
- NITTO DENKO CORPORATION 3,584