B22F WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
Introduced: September 1968
Description
B22F covers the entire spectrum of metallic powder technology, including production methods (atomization, comminution, gas or water separation), consolidation processes (sintering, hot isostatic pressing, compaction), and specialized equipment for handling metal powders. This subclass encompasses powder metallurgy techniques for manufacturing finished components and semi-finished products, as well as apparatus designed specifically for metallic powder operations. Related casting technologies are addressed in the parent class B22, while general powder handling methods appear in B01B.
Title
Titles differ between systems:
IPC: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
CPC: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
Full Title
Full titles differ between systems:
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
Additional Content IPC
Glossary
Compacting join or press firmly together. Sintering forming powder into a coherent mass by heating the powder whereby adjacent particles are joined by diffusion or superficial melting. Alloy alloys a composition of plural elements at least one of which is a free metal. Also includes material containing any combination of fibres, filaments, whiskers and particles, e.g. carbides, diamond, oxides, borides, nitrides or sulfides, embedded in a metallic matrix. Furnace furnaces covers kilns, ovens or retorts
Limiting references
Making non-ferrous alloy compositions by powder metallurgy Making non-ferrous alloys from mixtures of metallic powder with non-metallic powder Alloys containing diamond Alloys based on metal compounds, e.g. cermets Non-ferrous alloys containing metal compounds Making ferrous alloys by powder metallurgy Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy
Application references
Making ceramics by compacting or sintering Shaped ceramic products characterised by their composition Burning or sintering process for ceramic compositions Production or refining of metals; Pretreatment of raw materials for obtaining metals Sintering; Agglomerating of raw materials for obtaining metals Electrolytic production, recovery or refining of metallic powder Magnets or magnetic bodies characterised by the magnetic materials in the form of particles, e.g. powder , Magnets made by pressing, sintering or bonding metals or alloys in the form of particles, e.g. powder, together , Magnetic cores made from powder Devices using superconductivity or hyperconductivity characterised by the material
CPC subdivides this area 2x more granularly than IPC with 10 additional codes.
10 codes are CPC-only extensions.
Note: 10 CPC extensions are marked as secondary classification only.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B22F 1/00 Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties +1 CPC IPC+CPC Available in IPC and CPC
- B22F 10/00 Additive manufacturing of workpieces or articles from metallic powder (apparatus or devices therefor B22F12/00) since 2021 IPC+CPC Available in IPC and CPC
- B22F 12/00 Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices since 2021 +2 CPC IPC+CPC Available in IPC and CPC
- B22F 2302/00 Metal Compound, non-Metallic compound or non-metal composition of the powder or its coating 2nd only +10 CPC CPC only CPC only
- B22F 2303/00 Functional details of metal or compound in the powder or product, 2nd only +10 CPC CPC only CPC only
- B22F 2998/00 Supplementary information concerning processes or compositions relating to powder metallurgy 2nd only +1 CPC CPC only CPC only
- B22F 2999/00 Aspects linked to processes or compositions used in powder metallurgy 2nd only CPC only CPC only
- B22F 3/00 Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor +6 CPC IPC+CPC Available in IPC and CPC
- B22F 5/00 Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product +9 CPC IPC+CPC Available in IPC and CPC
- B22F 7/00 Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting +2 CPC IPC+CPC Available in IPC and CPC
- B22F 8/00 Manufacture of articles from scrap or waste metal particles since 1995 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B22,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 1,719
- CHINESE ACADEMY OF SCIENCES 1,489
- POSCO (POHANG IRON AND STEEL COMPANY) KR 1,248
- TOYOTA MOTOR CORPORATION 1,043
- SIEMENS DE 1,028
- CENTRAL SOUTH UNIVERSITY 959
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 891
- UNITED TECHNOLOGIES CORPORATION (UTC) US 786
- UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING 769
- JFE STEEL JP 761
Top Applicants (CPC)
Class B22,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,157
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 1,633
- SIEMENS DE 1,267
- POSCO (POHANG IRON AND STEEL COMPANY) KR 1,124
- CHINESE ACADEMY OF SCIENCES 1,040
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,015
- JFE STEEL JP 884
- CENTRAL SOUTH UNIVERSITY 810
- HITACHI METALS JP 641
- SINTOKOGIO JP 624