DIFF Subgroup
B29C 44/20 for articles of indefinite length
Introduced: January 1995
Full Title
Shaping by internal pressure generated in the material, e.g. swelling or foaming > for articles of indefinite length
Of 7 combined children, 5 exist in both systems.
2 codes are CPC-only extensions.
IPC defines codes here since 1995.
Child Classifications
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- B29C 44/22 consisting of at least two parts of chemically or physically different materials, e.g. having different densities since 1995 IPC+CPC Available in IPC and CPC
- B29C 44/28 Expanding the moulding material on continuous moving surfaces since 1995 +1 CPC IPC+CPC Available in IPC and CPC
- B29C 44/30 Expanding the moulding material between endless belts or rollers since 1995 +4 CPC IPC+CPC Available in IPC and CPC
- B29C 44/32 Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements since 1995 +7 CPC 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