B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
Description
B32B covers engineered materials and composite products constructed from two or more layers of different or identical materials bonded together. The classification encompasses laminates, sandwich structures, coated substrates, and multi-ply assemblies using flat, cellular, honeycomb, or other non-flat forms. Applications range from packaging films and adhesive tapes to structural composites, thermal insulation, sound-absorbing panels, and decorative laminates across construction, automotive, aerospace, and consumer goods industries. This subclass focuses on the material composition and layer structure itself rather than the manufacturing processes or end-use applications covered elsewhere.
Filing statistics
CPC subclass B32B recorded 381,235 patent applications worldwide between 2013 and 2023. Annual filings declined from 28,950 in 2013 to 24,486 in 2023 (-15%), peaking at 43,790 applications in 2016. The most active applicants in class B32 are NITTO DENKO CORPORATION (5,666 applications), SAINT-GOBAIN GLASS (4,491 applications) and 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) (3,703 applications).
Source: EPO PATSTAT, worldwide filings
95 direct subcodes
Child Classifications
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- B32B 1/00 Layered products having a non-planar shape
- B32B 11/00 Layered products comprising bituminous or tarry substances
- B32B 13/00 Layered products comprising a water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B 15/00 Layered products comprising metal
- B32B 17/00 Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B 18/00 Layered products essentially comprising ceramics, e.g. refractory products
- B32B 19/00 Layered products comprising natural mineral fibres or particles, e.g. asbestos, mica
- B32B 21/00 Layered products comprising wood, e.g. wood board, veneer, wood particle board
- B32B 2250/00 Layers arrangement
- B32B 2255/00 Coating on the layer surface
- B32B 2260/00 Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B 2262/00 Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B 2264/00 Composition or properties of particles which form a particulate layer or are present as additives
- B32B 2266/00 Composition of foam
- B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
- B32B 2272/00 Resin or rubber layer comprising scrap, waste or recycling material
- B32B 2274/00 Thermoplastic elastomer material
- B32B 23/00 Layered products comprising cellulosic plastic substances
- B32B 2305/00 Condition, form or state of the layers or laminate
- B32B 2307/00 Properties of the layers or laminate
Top Applicants
Top 10 applicants by patent filingsfor class B32, 2013–2023, worldwide · Source: EPO PATSTAT
- NITTO DENKO CORPORATION JP 5,666
- SAINT-GOBAIN GLASS FR 4,491
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 3,703
- DOW GLOBAL TECHNOLOGIES US 3,403
- NITTO DENKO CORPORATION 3,009
- FUJIFILM JP 2,629
- CORNING US 2,623
- LG CHEM KR 2,576
- SEKISUI CHEMICAL COMPANY JP 2,482
- TORAY INDUSTRIES JP 2,189