1509252

Information

• Patent Grant
• 1509252

• References
• Source

• Patent Number

  1,509,252

• Date Filed

  Not available

• Date Issued

  Tuesday, September 23, 1924
  100 years ago

• CPC

  • E03C1/294 - with provisions against loss of water lock
  • Y10T137/4531 - Divided and recombined passages
  • Y10T137/4583 - Topside access beneath cover plate closed floor opening

• US Classifications

  • 137 - Fluid handling
  • 138 - Pipes and tubular conduits