3577504

Information

• Patent Grant
• 3577504

• References
• Source

• Patent Number

  3,577,504

• Date Filed

  Not available

• Date Issued

  Tuesday, May 4, 1971
  53 years ago

• CPC

  • B28B23/22 - assembled from preformed parts
  • B28B23/046 - Post treatment to obtain pre-stressed articles
  • B28B23/06 - for the production of elongated articles
  • E04C3/20 - of concrete or other stone-like material
  • E04C3/205 - with apertured web
  • E04C3/26 - prestressed

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 052 - Static structures