3926835

Information

• Patent Grant
• 3926835

• References
• Source

• Patent Number

  3,926,835

• Date Filed

  Not available

• Date Issued

  Tuesday, December 16, 1975
  48 years ago

• CPC

  • C09B57/00 - Other synthetic dyes of known constitution
  • B29D11/00634 - Production of filters
  • C08K5/0041 - Optical brightening agents, organic pigments
  • C09B1/285 - Dyes with no other substituents than the amino groups
  • G02B5/223 - containing organic substances

• US Classifications

  • 252 - Compositions
  • 359 - Optical: systems and elements