3639973

Information

• Patent Grant
• 3639973

• References
• Source

• Patent Number

  3,639,973

• Date Filed

  Not available

• Date Issued

  Tuesday, February 8, 1972
  53 years ago

• CPC

  • B28B23/22 - assembled from preformed parts
  • E04C3/22 - built-up by elements jointed in line
  • Y10T29/49874 - Prestressing rod, filament or strand
  • Y10T29/49888 - Subsequently coating

• US Classifications

  • 029 - Metal working