1989612

Information

• Patent Grant
• 1989612

• References
• Source

• Patent Number

  1,989,612

• Date Filed

  Not available

• Date Issued

  Tuesday, January 29, 1935
  90 years ago

• CPC

  • F26B21/002 - heating the drying air indirectly
  • C10G9/20 - Tube furnaces

• US Classifications

  • 122 - Liquid heaters and vaporizers
  • 110 - Furnaces
  • 165 - Heat exchange
  • 196 - Mineral oils: apparatus