3370902

Information

• Patent Grant
• 3370902

• References
• Source

• Patent Number

  3,370,902

• Date Filed

  Not available

• Date Issued

  Tuesday, February 27, 1968
  56 years ago

• CPC

  • G02B5/23 - Photochromic filters
  • G02C7/102 - Photochromic filters
  • G02C7/108 - Colouring materials
  • G03C1/731 - Biological compounds

• US Classifications

  • 359 - Optical: systems and elements
  • 252 - Compositions
  • 428 - Stock material or miscellaneous articles
  • 430 - Radiation imagery chemistry: process, composition, or product thereof