489639

Information

• Patent Grant
• 489639

• References
• Source

• Patent Number

  489,639

• Date Filed

  Not available

• Date Issued

  Tuesday, January 10, 1893
  132 years ago

• CPC

  • E03C1/295 - using air-supply valves
  • Y10T137/3258 - Automatic valve in vent line
  • Y10T137/4486 - Plural valves or valve seats
  • Y10T137/4531 - Divided and recombined passages

• US Classifications

  • 137 - Fluid handling
  • 210 - Liquid purification or separation