3904440

Information

• Patent Grant
• 3904440

• References
• Source

• Patent Number

  3,904,440

• Date Filed

  Not available

• Date Issued

  Tuesday, September 9, 1975
  50 years ago

• CPC

  • H01M2/0252 - High- temperature cells or batteries
  • B23K11/004 - Welding of a small piece to a great or broad piece
  • H01M6/20 - working at high temperature

• US Classifications

  • 219 - Electric heating