2839157

Information

• Patent Grant
• 2839157

• References
• Source

• Patent Number

  2,839,157

• Date Filed

  Not available

• Date Issued

  Tuesday, June 17, 1958
  66 years ago

• CPC

  • A62B13/00 - Special devices for ventilating gasproof shelters
  • A62B23/04 - for gasproof shelters
  • B01D46/30 - Particle separators
  • E04H9/04 - against air-raid or other warlike actions
  • F24F3/1603 - by filtering
  • Y10S454/902 - Air raid shelter ventilation

• US Classifications

  • 454 - Ventilation
  • 052 - Static structures
  • 055 - Gas separation
  • 109 - Safes, bank protection, or a related device