1430306

Information

• Patent Grant
• 1430306

• References
• Source

• Patent Number

  1,430,306

• Date Filed

  Not available

• Date Issued

  Tuesday, September 26, 1922
  102 years ago

• CPC

  • E21D1/16 - by petrification
  • E02D19/16 - by placing or applying sealing substances

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 404 - Road structure, process, or apparatus