1390497

Information

• Patent Grant
• 1390497

• References
• Source

• Patent Number

  1,390,497

• Date Filed

  Not available

• Date Issued

  Tuesday, September 13, 1921
  103 years ago

• CPC

  • G01N25/46 - for investigating the composition of gas mixtures

• US Classifications

  • 073 - Measuring and testing
  • 034 - Drying and gas or vapor contact with solids
  • 340 - Communications: electrical
  • 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing