3890685

Information

• Patent Grant
• 3890685

• References
• Source

• Patent Number

  3,890,685

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1975
  49 years ago

• CPC

  • F28F5/06 - Hollow screw conveyors
  • B23P15/26 - heat exchangers or the like
  • Y10T29/49316 - Impeller making

• US Classifications

  • 029 - Metal working
  • 165 - Heat exchange
  • 416 - Fluid reaction surfaces
  • 470 - Threaded, headed fastener, or washer making: process and apparatus