IPC Subgroup
B09C 1/02 Extraction using liquids, e.g. washing, leaching
Introduced: January 1995
Last revised: January 2006
Full Title
Reclamation of contaminated soil > Extraction using liquids, e.g. washing, leaching
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- Subclass:
- RECLAMATION OF CONTAMINATED SOIL
Top Applicants
Top 10 applicants by patent filingsfor class B09, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 776
- TAIHEIYO CEMENT CORPORATION 279
- BEIJING GEOENVIRON ENGINEERING & TECHNOLOGY 247
- ZHEJIANG UNIVERSITY 232
- CENTRAL SOUTH UNIVERSITY 212
- KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 208
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 203
- CHANGZHOU UNIVERSITY 172
- BCEG ENVIRONMENTAL REMEDIATION COMPANY 167
- UNI-CHARM CORPORATION JP 165