3592238

Information

• Patent Grant
• 3592238

• References
• Source

• Patent Number

  3,592,238

• Date Filed

  Not available

• Date Issued

  Tuesday, July 13, 1971
  53 years ago

• CPC

  • F16L59/065 - using vacuum
  • F16L59/125 - Helical spacers

• US Classifications

  • 138 - Pipes and tubular conduits
  • 174 - Electricity: conductors and insulators