2806957

Information

• Patent Grant
• 2806957

• References
• Source

• Patent Number

  2,806,957

• Date Filed

  Not available

• Date Issued

  Tuesday, September 17, 1957
  67 years ago

• CPC

  • G01N21/314 - with comparison of measurements at specific and non-specific wavelengths
  • G01N21/35 - using infra-red light
  • G01N21/3504 - for analysing gases
  • G01N21/3563 - for analysing solids Preparation of samples therefor
  • G01N21/3577 - for analysing liquids
  • G01N2021/3527 - and using one filter cell as attenuator

• US Classifications

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