2512993

Information

• Patent Grant
• 2512993

• References
• Source

• Patent Number

  2,512,993

• Date Filed

  Not available

• Date Issued

  Tuesday, June 27, 1950
  74 years ago

• CPC

  • G02B3/00 - Simple or compound lenses
  • C03C3/064 - containing boron
  • 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