GRATES (inlets for fluidisation air for fluidised bed combustion apparatus F23C10/20); CLEANING OR RAKING GRATES

Introduced: September 1968

Description

F23H covers mechanical grates used in combustion apparatus and devices for their maintenance. This classification encompasses fixed and moving grates designed to support fuel in furnaces, boilers, and fireplaces, as well as mechanisms for cleaning, raking, or removing ash and clinker from grate surfaces during operation. The scope includes grate constructions, support structures, and powered or manual cleaning systems integrated with or retrofitted to combustion equipment. Related combustion apparatus classifications (such as F23B for furnace structures) are distinguished by their focus on the overall combustion chamber rather than the grate element itself.

Title

Titles differ between systems:

IPC: GRATES; CLEANING OR RAKING GRATES

CPC: GRATES (inlets for fluidisation air for fluidised bed combustion apparatus F23C10/20); CLEANING OR RAKING GRATES

Full Title

Full titles differ between systems:

IPC:

GRATES; CLEANING OR RAKING GRATES

CPC:

GRATES (inlets for fluidisation air for fluidised bed combustion apparatus F23C10/20); CLEANING OR RAKING GRATES

Of 11 combined children, 9 exist in both systems.

2 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

6 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

F23H 1/00 Grates with solid bars (double grates F23H5/00) IPC+CPC Available in IPC and CPC
F23H 11/00 Travelling-grates IPC+CPC Available in IPC and CPC
F23H 13/00 Grates not covered by any of groups F23H1/00-F23H11/00 IPC+CPC Available in IPC and CPC
F23H 15/00 Cleaning arrangements for grates (not forming part of the grate F23J1/00); Moving fuel along grates (grates with bars rocked about their longitudinal axes and specially adapted for moving fuel along the grate F23H9/10; for travelling-grates F23H11/22) IPC+CPC Available in IPC and CPC
F23H 17/00 Details of grates IPC+CPC Available in IPC and CPC
F23H 2700/00 Grates characterised by special features or applications 2nd only +9 CPC CPC only CPC only
F23H 2900/00 Special features of combustion grates 2nd only +4 CPC CPC only CPC only
F23H 3/00 Grates with hollow bars IPC+CPC Available in IPC and CPC
F23H 5/00 Double grates IPC+CPC Available in IPC and CPC
F23H 7/00 Inclined grates (inclined travelling grates F23H11/12) IPC+CPC Available in IPC and CPC
F23H 9/00 Revolving-grates; Rocking or shaking grates (inclined grates F23H7/00) IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F23,2013–2023, worldwide · Source: EPO PATSTAT

GE (GENERAL ELECTRIC COMPANY) US 2,124
XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
NINGBO FOTILE KITCHENWARE COMPANY 1,363
SIEMENS DE 997
UNITED TECHNOLOGIES CORPORATION (UTC) US 937
GE (GENERAL ELECTRIC COMPANY) 898
VATTI 815
CHINESE ACADEMY OF SCIENCES 719
RINNAI COMPANY 708
MITSUBISHI HITACHI POWER SYSTEMS 670

Top Applicants (CPC)

Class F23,2013–2023, worldwide · Source: EPO PATSTAT

GE (GENERAL ELECTRIC COMPANY) US 2,581
UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
SIEMENS DE 1,157
GE (GENERAL ELECTRIC COMPANY) 994
XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
MITSUBISHI HEAVY INDUSTRIES JP 701
MITSUBISHI HITACHI POWER SYSTEMS JP 695
RAYTHEON TECHNOLOGIES CORPORATION US 587
NINGBO FOTILE KITCHENWARE COMPANY 543
GENERAL ELECTRIC TECHNOLOGY CH 490