3520968

Information

• Patent Grant
• 3520968

• References
• Source

• Patent Number

  3,520,968

• Date Filed

  Not available

• Date Issued

  Tuesday, July 21, 1970
  54 years ago

• CPC

  • B28B21/60 - prestressed reinforcements

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 052 - Static structures
  • 138 - Pipes and tubular conduits