B29B PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
Introduced: September 1968
Description
B29B encompasses preparation, pretreatment, and conditioning operations on plastic materials prior to shaping or molding processes, including mixing, blending, heating, and drying of virgin or recycled polymers. The class also covers granulation, pelletization, and formation of preforms—intermediate products used in subsequent shaping operations. Additionally, B29B includes recovery and separation technologies for extracting plastics and other valuable constituents from waste streams, such as sorting, cleaning, and processing of post-consumer or post-industrial plastic waste. This classification bridges upstream material processing and downstream shaping technologies covered in other B29 subclasses, excluding the actual shaping/molding operations themselves.
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
6 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1985.
Child Classifications
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- B29B 11/00 Making preforms (B29C61/06 takes precedence ) since 1985 IPC+CPC Available in IPC and CPC
- B29B 13/00 Conditioning or physical treatment of the material to be shaped (chemical aspects C08J3/00 ) since 1985 +3 CPC IPC+CPC Available in IPC and CPC
- B29B 15/00 Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 since 1985 IPC+CPC Available in IPC and CPC
- B29B 17/00 Recovery of plastics or other constituents of waste material containing plastics; ( chemical recovery C08J11/00) since 1985 +5 CPC IPC+CPC Available in IPC and CPC
- B29B 7/00 Mixing; Kneading ( in general B01F; combined with calendering B29C43/24, with injection B29C45/46, with extrusion B29C48/36) since 1985 +1 CPC IPC+CPC Available in IPC and CPC
- B29B 9/00 Making granules (in general B01J; chemical aspects C08J3/12) since 1985 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B29,2013–2023, worldwide · Source: EPO PATSTAT
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 3,802
- BOEING COMPANY US 3,087
- COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN FR 2,315
- SUMITOMO RUBBER IND 1,784
- GE (GENERAL ELECTRIC COMPANY) US 1,663
- CANON 1,658
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,587
- TORAY INDUSTRIES JP 1,555
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,470
- LG CHEM KR 1,415
Top Applicants (CPC)
Class B29,2013–2023, worldwide · Source: EPO PATSTAT
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 4,167
- BOEING COMPANY US 3,701
- COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN FR 2,554
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 2,240
- TORAY INDUSTRIES JP 2,133
- GE (GENERAL ELECTRIC COMPANY) US 2,069
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 2,028
- LG CHEM KR 1,962
- DOW GLOBAL TECHNOLOGIES US 1,896
- CONTINENTAL REIFEN DE 1,725