3656515

Information

• Patent Grant
• 3656515

• References
• Source

• Patent Number

  3,656,515

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1972
  52 years ago

• CPC

  • E04C3/06 - with substantially solid
  • E06B3/16 - Hollow frames of special construction
  • E04C2003/0413 - being built up from several parts
  • E04C2003/043 - the hollow cross-section comprising at least one enclosed cavity
  • Y10S138/11 - Shape

• US Classifications

  • 138 - Pipes and tubular conduits
  • D25 - Building units and construction elements