BOILING; BOILING APPARATUS

Description

B01B covers apparatus and methods for boiling liquids in industrial, laboratory, and chemical processing contexts. This subclass encompasses boiling vessels, kettles, stills, evaporators, and associated heat transfer equipment designed to facilitate phase change from liquid to vapor. The classification includes systems for controlling boiling conditions, such as heating methods, pressure regulation, and vapor separation, but excludes specialized boiling applications integral to distillation (B01D) or specific chemical synthesis processes classified elsewhere.

Filing statistics

CPC subclass B01B recorded 1,041 patent applications worldwide between 2013 and 2023. Annual filings declined from 90 in 2013 to 77 in 2023 (-14%), peaking at 154 applications in 2020. The most active applicants in class B01 are SINOPEC (CHINA PETROCHEMICAL CORPORATION) (10,345 applications), CHINESE ACADEMY OF SCIENCES (8,352 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (5,134 applications).

Source: EPO PATSTAT, worldwide filings