3656690

Information

• Patent Grant
• 3656690

• References
• Source

• Patent Number

  3,656,690

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1972
  52 years ago

• CPC

  • E01B1/008 - Drainage of track
  • E01B29/005 - Making of concrete parts of the track in situ
  • E01B1/001 - Track with ballast
  • E01B1/002 - Ballastless track
  • E01B2204/01 - Elastic layers other than rail-pads
  • E01B2204/03 - Injecting, mixing or spraying additives into or onto ballast or underground
  • E01B2204/09 - Ballastless systems

• US Classifications

  • 238 - Railways: surface track
  • 104 - Railways
  • 404 - Road structure, process, or apparatus