3802776

Information

• Patent Grant
• 3802776

• References
• Source

• Patent Number

  3,802,776

• Date Filed

  Not available

• Date Issued

  Tuesday, April 9, 1974
  50 years ago

• CPC

  • G06G7/75 - for component analysis
  • G01N21/27 - using photo-electric detection circuits for computing concentration
  • G01N21/314 - with comparison of measurements at specific and non-specific wavelengths

• US Classifications

  • 356 - Optics: measuring and testing
  • 250 - Radiant energy