CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION

Description

F23G covers furnaces designed for cremation of human or animal remains, as well as combustion systems for disposing of waste materials or burning low-grade fuels. This subclass includes the structural design, heat management, emission control, and operational features of crematory equipment and waste-to-energy combustion installations. Technologies addressing ash handling, temperature regulation, and pollution mitigation in such facilities fall within this scope, whereas general industrial furnaces for standard fuel combustion are classified elsewhere under F23.

Filing statistics

CPC subclass F23G recorded 27,613 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,188 in 2013 to 2,441 in 2023 (+105%), peaking at 3,992 applications in 2020. The most active applicants in class F23 are GE (GENERAL ELECTRIC COMPANY) (2,581 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (1,180 applications) and SIEMENS (1,157 applications).

Source: EPO PATSTAT, worldwide filings