Vacuum casting, i.e. making use of vacuum to fill the mould

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Pressure casting; Vacuum casting > Vacuum casting, i.e. making use of vacuum to fill the mould

CPC:

Pressure casting; Vacuum casting (B22D17/00 takes precedence; treating the metal in the mould by using pressure or vacuum B22D27/00) > Vacuum casting, i.e. making use of vacuum to fill the mould

No child classifications to compare. This is a leaf node in both 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