3664725

Information

• Patent Grant
• 3664725

• References
• Source

• Patent Number

  3,664,725

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1972
  52 years ago

• CPC

  • C03C3/16 - containing phosphorus
  • C03C3/087 - containing calcium oxide
  • C03C3/095 - containing rare earths
  • C03C3/17 - containing aluminium or beryllium
  • C03C3/253 - containing germanium
  • C03C4/0071 - for laserable glass
  • C03C4/065 - for silver-halide free photochromic glass
  • G02F1/0126 - by another light beam
  • G02F2/02 - Frequency-changing of light

• US Classifications

  • 359 - Optical: systems and elements
  • 501 - Compositions: ceramic