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DIFF Subclass Not Allocatable
F21H

INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION

Introduced: September 1968

Description

F21H covers incandescent mantles and other luminous or heat-emitting bodies that operate by heating through direct combustion or flame exposure. This includes gas mantles (typically thorium oxide or similar refractory materials), burner designs for mantle lighting systems, and the structural elements that support incandescent bodies in combustion-based lamps. The classification encompasses both the mantles themselves and the apparatus for maintaining and igniting them, but excludes electric incandescent lamps and non-incandescent combustion lighting (covered under other F21 subclasses).

Additional Content IPC

Glossary

Incandescent Capable of emitting visible light when heated. Incandescent mantle Incandescent mantles A device comprising a lace-like hood or envelope of thin, porous, refractory material that glows when it is positioned in a flame or otherwise heated by combustion of a distinct combustible material. Light source Light sources The entity (e.g. mantle) that generates light for a lighting device or apparatus.

Application references

Lighting devices or systems thereof, being portable or specially adapted for transportation Non-portable lighting devices; Systems thereof Functional features or details of lighting devices or systems thereof; Structural combinations of lighting devices with other articles, not otherwise provided for Fastening incandescent mantles or other incandescent bodies to lamp parts; Suspension devices for incandescent mantles or other incandescent bodies Arrangements of mantles or other incandescent bodies on burners

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F21H 3/00 Manufacturing incandescent mantles; Treatment prior to use, e.g. burning-off; Machines for manufacturing IPC+CPC Available in IPC and CPC
  • F21H 5/00 Solid incandescent bodies (incandescent mantles F21H1/00) IPC+CPC Available in IPC and CPC
  • F21H 7/00 Other incandescent bodies since 2009 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F21,2013–2023, worldwide · Source: EPO PATSTAT

  1. PANASONIC INTELLECTUAL PROPERTY 3,883
  2. VALEO VISION FR 2,797
  3. KOITO MANUFACTURING COMPANY 2,531
  4. OPPLE LIGHTING COMPANY 2,343
  5. SIGNIFY HOLDING NL 2,275
  6. TOSHIBA LIGHTING & TECHNOLOGY CORPORATION 1,982
  7. KOITO MANUFACTURING COMPANY JP 1,766
  8. LG INNOTEK COMPANY KR 1,651
  9. SUZHOU OPPLE LIGHTING COMPANY 1,633
  10. MITSUBISHI ELECTRIC CORPORATION 1,591

Top Applicants (CPC)

Class F21,2013–2023, worldwide · Source: EPO PATSTAT

  1. VALEO VISION FR 2,820
  2. SIGNIFY HOLDING NL 2,374
  3. KOITO MANUFACTURING COMPANY JP 1,890
  4. KOITO MANUFACTURING COMPANY 1,722
  5. LG INNOTEK COMPANY KR 1,624
  6. OSRAM DE 1,507
  7. LG ELECTRONICS KR 1,458
  8. PANASONIC INTELLECTUAL PROPERTY JP 1,433
  9. ZUMTOBEL LIGHTING AT 1,349
  10. PANASONIC INTELLECTUAL PROPERTY 1,275