3488816

Information

• Patent Grant
• 3488816

• References
• Source

• Patent Number

  3,488,816

• Date Filed

  Not available

• Date Issued

  Tuesday, January 13, 1970
  54 years ago

• CPC

  • E04G21/121 - Construction of stressing jacks
  • B22F3/14 - simultaneously
  • B28B23/04 - the elements being stressed
  • B28B23/06 - for the production of elongated articles
  • B28B23/12 - to form prestressed circumferential reinforcements
  • E04C5/065 - Light-weight girders

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus