B29C 48/25 Component parts, details or accessories; Auxiliary operations
Full Title
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C49/04) > Component parts, details or accessories; Auxiliary operations
Filing statistics
CPC B29C 48/25 belongs to the parent subclass B29C, which recorded 482,920 patent applications worldwide between 2013 and 2023. Annual filings grew from 33,461 in 2013 to 35,822 in 2023 (+7%), peaking at 52,604 applications in 2018. The most active applicants in class B29 are HEWLETT-PACKARD DEVELOPMENT COMPANY (4,167 applications), BOEING COMPANY (3,701 applications) and COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN (2,554 applications).
Source: EPO PATSTAT, worldwide filings
22 direct subcodes
Child Classifications
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- B29C 48/255 Flow control means, e.g. valves (flow dividers B29C48/695)
- B29C 48/265 Support structures or bases for apparatus, e.g. frames
- B29C 48/27 Cleaning; Purging; Avoiding contamination
- B29C 48/275 Recovery or reuse of energy or materials
- B29C 48/28 Storing of extruded material, e.g. by winding up or stacking
- B29C 48/285 Feeding the extrusion material to the extruder
- B29C 48/30 Extrusion nozzles or dies (extrusion characterised by the shape or cross-section of the extruded article B29C48/03)
- B29C 48/355 Conveyors for extruded articles
- B29C 48/36 Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C 48/78 Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C 48/88 Thermal treatment of the stream of extruded material, e.g. cooling
- B29C 48/92 Measuring, controlling or regulating
Top Applicants
Top 10 applicants by patent filingsfor 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