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DIFF Subgroup
G03C 1/12

Methine and polymethine dyes

Introduced: September 1968

Title

Titles differ between systems:

IPC: Methine or polymethine dyes

CPC: Methine and polymethine dyes

Full Title

Full titles differ between systems:

IPC:

Photosensitive materials > Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein > with non-macromolecular additives > Sensitivity-increasing substances > Organic substances > Methine or polymethine dyes

CPC:

Photosensitive materials (photosensitive materials for multicolour processes G03C7/00; for diffusion transfer processes G03C8/00; photosensitive glass C03C4/04) > Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein (catalytic amounts of silver halide in dry silver systems G03C1/494) > with non-macromolecular additives (G03C1/047 takes precedence; ) > Sensitivity-increasing substances > Organic substances > Methine and polymethine dyes

Of 7 combined children, 4 exist in both systems.

3 codes are CPC-only extensions.

Child Classifications

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  • G03C 1/122 CPC only CPC only
  • G03C 1/125 CPC only CPC only
  • G03C 1/127 CPC only CPC only
  • G03C 1/22 with an even number of CH groups IPC+CPC Available in IPC and CPC
  • G03C 1/24 Styryl dyes IPC+CPC Available in IPC and CPC
  • G03C 1/26 Polymethine chain forming part of a heterocyclic ring IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class G03,2013–2023, worldwide · Source: EPO PATSTAT

  1. CANON 31,416
  2. CANON JP 17,469
  3. KYOCERA DOCUMENT SOLUTIONS 9,845
  4. RICOH COMPANY 9,807
  5. ASML NETHERLANDS NL 9,427
  6. FUJIFILM JP 7,225
  7. KONICA MINOLTA CORPORATION 7,216
  8. FUJI XEROX COMPANY 5,711
  9. CARL ZEISS SMT DE 4,971
  10. RICOH COMPANY JP 4,123

Top Applicants (CPC)

Class G03,2013–2023, worldwide · Source: EPO PATSTAT

  1. CANON JP 19,215
  2. CANON 12,916
  3. ASML NETHERLANDS NL 10,000
  4. FUJIFILM JP 7,814
  5. SAMSUNG ELECTRONICS COMPANY KR 5,181
  6. CARL ZEISS SMT DE 5,079
  7. RICOH COMPANY JP 4,343
  8. LG INNOTEK COMPANY KR 4,054
  9. KYOCERA DOCUMENT SOLUTIONS 3,812
  10. KYOCERA DOCUMENT SOLUTIONS JP 3,682