LAYERED PRODUCTS

Description

B32 encompasses the manufacture, treatment, and properties of composite materials formed by bonding or assembling multiple layers of different substances into integrated structures. This class covers laminated products, sandwich structures, coated substrates, and multi-ply materials where individual layers provide distinct functional properties (mechanical, thermal, electrical, or protective). Applications include decorative laminates, thermal insulation panels, reinforced composites, and industrial coatings on various base materials. The classification focuses on the structural and manufacturing aspects of layered constructions rather than the properties of individual component materials, which are covered in related material-specific classes.

Filing statistics

IPC B32 recorded 496,494 patent applications worldwide between 2013 and 2023, summed across its 1 subclasses. Annual filings grew from 37,194 in 2013 to 37,603 in 2023 (+1%), peaking at 55,086 applications in 2020. The most active applicants in class B32 are NITTO DENKO CORPORATION (4,719 applications), DNP (DAINIPPON PRINTING COMPANY) (3,989 applications) and SAINT-GOBAIN GLASS (3,695 applications).

Source: EPO PATSTAT, worldwide filings