2731877

Information

• Patent Grant
• 2731877

• References
• Source

• Patent Number

  2,731,877

• Date Filed

  Not available

• Date Issued

  Tuesday, January 24, 1956
  68 years ago

• CPC

  • G01N21/4133 - Refractometers
  • Y10S55/34 - Indicator and controllers
  • Y10S73/11 - Photoelectric cell

• US Classifications

  • 356 - Optics: measuring and testing
  • 055 - Gas separation
  • 073 - Measuring and testing
  • 250 - Radiant energy