1980455

Information

• Patent Grant
• 1980455

• References
• Source

• Patent Number

  1,980,455

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1934
  90 years ago

• CPC

  • F22D5/14 - responsive to thermal expansion and contraction

• US Classifications

  • 251 - Valves and valve actuation
  • 122 - Liquid heaters and vaporizers