INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

Description

C01P is an indexing scheme used to classify solid inorganic compounds based on their structural and physical properties rather than chemical composition or preparation methods. This classification captures characteristics such as crystal structure, particle morphology, porosity, surface area, and phase composition of inorganic materials. It serves as a supplementary tool to complement primary chemical classifications, enabling cross-referencing of patents by material properties that are relevant to performance and applications. This scheme is particularly useful for identifying patents involving advanced materials like nanostructured compounds, composites, and specialized ceramics where physical form significantly influences functionality.

Filing statistics

CPC subclass C01P recorded 134,252 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,057 in 2013 to 14,980 in 2023 (+147%), peaking at 15,948 applications in 2022. The most active applicants in class C01 are CHINESE ACADEMY OF SCIENCES (4,293 applications), LG CHEM (3,317 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (2,219 applications).

Source: EPO PATSTAT, worldwide filings