3781090

Information

• Patent Grant
• 3781090

• References
• Source

• Patent Number

  3,781,090

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • C03C17/3452 - comprising a fluoride
  • C03C17/3411 - with at least two coatings of inorganic materials
  • C03C17/3417 - all coatings being oxide coatings
  • C03C17/3429 - at least one of the coatings being a non-oxide coating
  • C03C17/347 - comprising a sulfide or oxysulfide
  • C03C17/3494 - comprising other salts
  • G02B1/115 - Multilayers

• US Classifications

  • 359 - Optical: systems and elements