3643457

Information

• Patent Grant
• 3643457

• References
• Source

• Patent Number

  3,643,457

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1972
  52 years ago

• CPC

  • F25D21/025 - using air pressure differential detectors
  • F24F5/001 - Compression cycle type
  • F25D21/02 - Detecting the presence of frost or condensate

• US Classifications

  • 062 - Refrigeration