2647977

Information

• Patent Grant
• 2647977

• References
• Source

• Patent Number

  2,647,977

• Date Filed

  Not available

• Date Issued

  Tuesday, August 4, 1953
  71 years ago

• CPC

  • C04B41/0081 - characterised by the subsequent cooling step
  • H01C7/022 - mainly consisting of non-metallic substances

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 338 - Electrical resistors