2805166

Information

• Patent Grant
• 2805166

• References
• Source

• Patent Number

  2,805,166

• Date Filed

  Not available

• Date Issued

  Tuesday, September 3, 1957
  67 years ago

• CPC

  • C03C3/095 - containing rare earths
  • Y10S501/903 - having refractive index less than 1.8 and ABBE number less than 70
  • Y10S501/906 - Thorium oxide containing

• US Classifications

  • 501 - Compositions: ceramic
  • 313 - Electric lamp and discharge devices