3476499

Information

• Patent Grant
• 3476499

• References
• Source

• Patent Number

  3,476,499

• Date Filed

  Not available

• Date Issued

  Tuesday, November 4, 1969
  55 years ago

• CPC

  • B29D11/00903 - on the surface
  • B29D11/00 - Producing optical elements
  • B29D11/00317 - Production of lenses with markings or patterns
  • D06P1/0076 - Dyeing with mineral dye
  • D06P3/00 - Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • G02B1/043 - Contact lenses
  • G02C7/046 - Contact lenses having an iris pattern
  • G03C1/496 - Binder-free compositions

• US Classifications

  • 008 - Bleaching and dyeing
  • 351 - Optics: eye examining, vision testing and correcting