3869988

Information

• Patent Grant
• 3869988

• References
• Source

• Patent Number

  3,869,988

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1975
  49 years ago

• CPC

  • E01B1/001 - Track with ballast
  • E01B27/12 - Packing sleepers, with or without concurrent work on the track Compacting track-carrying ballast
  • E01B2204/03 - Injecting, mixing or spraying additives into or onto ballast or underground

• US Classifications

  • 104 - Railways
  • 524 - Synthetic resins or natural rubbers