IPC Subgroup
B41M 5/3 using chemical colour formers
Introduced: January 1990
Last revised: January 2006
Full Title
Duplicating or marking methods; Sheet materials for use therein > Thermography > using chemical colour formers
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- Subclass:
- PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
4 direct subcodes
Child Classifications
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- B41M 5/32 one component thereof being a heavy metal compound
- B41M 5/323 Organic colour formers, e.g. leuco dyes
- B41M 5/333 Colour developing components therefor, e.g. acidic compounds
- B41M 5/337 Additives; Binders
Top Applicants
Top 10 applicants by patent filingsfor class B41, 2013–2023, worldwide · Source: EPO PATSTAT
- SEIKO EPSON CORPORATION 14,672
- CANON 14,153
- RICOH COMPANY 8,049
- SEIKO EPSON CORPORATION JP 8,044
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,312
- BROTHER INDUSTRIES 6,887
- KYOCERA DOCUMENT SOLUTIONS 5,463
- CANON JP 5,001
- KONICA MINOLTA CORPORATION 4,512
- BROTHER INDUSTRIES JP 3,681