DIFF Subgroup
F26B 21/20 Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
Introduced: January 2026
Full Title
Arrangements for supplying or controlling air or other gases for drying solid materials or objects > Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 2026.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class F26,2013–2023, worldwide · Source: EPO PATSTAT
- LG ELECTRONICS KR 392
- TRUKING TECHNOLOGY 292
- CHINESE ACADEMY OF SCIENCES 258
- MENGZHOU YUANHONG DRYING EQUIPMENT RESEARCH AND DEVELOPMENT COMPANY 190
- HAIER SMART HOME 176
- SGCC(STATE GRID CORPORATION OF CHINA) 174
- LG ENERGY SOLUTION KR 166
- SCREEN HOLDINGS JP 162
- GREE ELECTRIC APPLIANCES 157
- SAMSUNG ELECTRONICS COMPANY KR 152
Top Applicants (CPC)
Class F26,2013–2023, worldwide · Source: EPO PATSTAT
- LG ELECTRONICS KR 487
- DUERR SYSTEMS DE 205
- SCREEN HOLDINGS JP 200
- SEMES COMPANY KR 187
- SAMSUNG ELECTRONICS COMPANY KR 181
- LG ENERGY SOLUTION KR 178
- TOKYO ELECTRON JP 168
- LG CHEM KR 166
- CHINESE ACADEMY OF SCIENCES 139
- SCREEN HOLDINGS 127