3878987

Information

• Patent Grant
• 3878987

• References
• Source

• Patent Number

  3,878,987

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1975
  49 years ago

• CPC

  • E01B1/008 - Drainage of track
  • E01B3/38 - Longitudinal sleepers Longitudinal sleepers integral or combined with tie-rods Combined longitudinal and transverse sleepers Layers of concrete supporting both rails
  • E01B3/40 - Slabs Blocks Pot sleepers Fastening tie-rods to them
  • E01B1/001 - Track with ballast
  • E01B2204/03 - Injecting, mixing or spraying additives into or onto ballast or underground
  • E01B2204/07 - Drainage

• US Classifications

  • 238 - Railways: surface track
  • 104 - Railways
  • 404 - Road structure, process, or apparatus
  • 405 - Hydraulic and earth engineering