3504722

Information

• Patent Grant
• 3504722

• References
• Source

• Patent Number

  3,504,722

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1970
  54 years ago

• CPC

  • B21H3/025 - Rolling locking screws
  • F16B25/0052 - the ridge having indentations, notches or the like in order to improve the cutting behaviour
  • F16B25/0078 - with a shaft of non-circular cross-section or other special geometric features of the shaft
  • F16B39/30 - Locking exclusively by special shape of the screw-thread
  • Y10S411/938 - Distorted thread
  • Y10S470/906 - Nylon plug lock

• US Classifications

  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
  • 470 - Threaded, headed fastener, or washer making: process and apparatus