3877783

Information

• Patent Grant
• 3877783

• References
• Source

• Patent Number

  3,877,783

• Date Filed

  Not available

• Date Issued

  Tuesday, April 15, 1975
  49 years ago

• CPC

  • G02B6/0281 - Graded index region forming part of the central core segment
  • C03B37/023 - Fibres composed of different sorts of glass
  • C03B37/027 - Fibres composed of different sorts of glass
  • C03B37/02718 - Thermal treatment of the fibre during the drawing process
  • C03B37/029 - Furnaces therefor
  • C03C21/00 - Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
  • C03C21/001 - in liquid phase
  • C03B2201/30 - doped with metals
  • C03B2201/50 - doped with alkali metals
  • C03B2203/06 - Axial perturbations
  • C03B2203/22 - Radial profile of refractive index, composition or softening point
  • C03B2205/02 - Upward drawing
  • C03B2205/55 - Cooling or annealing the drawn fibre prior to coating using a series of coolers or heaters
  • C03B2205/56 - Annealing or re-heating the drawn fibre prior to coating

• US Classifications

  • 385 - Optical waveguides
  • 065 - Glass manufacturing