3687346

Information

• Patent Grant
• 3687346

• References
• Source

• Patent Number

  3,687,346

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1972
  52 years ago

• CPC

  • E01B27/022 - by devices moving on the track with or without spreading or levelling
  • E01B3/34 - with pre-tensioned armouring or reinforcement
  • E01B3/38 - Longitudinal sleepers Longitudinal sleepers integral or combined with tie-rods Combined longitudinal and transverse sleepers Layers of concrete supporting both rails

• US Classifications

  • 238 - Railways: surface track