Homopolymers of cyclic compounds having no unsaturated aliphatic radicals in a side chain and having one or more carbon-to-carbon double bonds in a heterocyclic ring (cyclic esters of polyfunctional acids C08F118/00; cyclic anhydrides or imides C08F122/00)

Filing statistics

CPC C08F 134/00 belongs to the parent subclass C08F, which recorded 237,976 patent applications worldwide between 2013 and 2023. Annual filings grew from 14,700 in 2013 to 19,629 in 2023 (+34%), peaking at 25,260 applications in 2020. The most active applicants in class C08 are LG CHEM (15,432 applications), DOW GLOBAL TECHNOLOGIES (14,214 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (11,155 applications).

Source: EPO PATSTAT, worldwide filings