3644973

Information

• Patent Grant
• 3644973

• References
• Source

• Patent Number

  3,644,973

• Date Filed

  Not available

• Date Issued

  Tuesday, February 29, 1972
  52 years ago

• CPC

  • B21D41/04 - Reducing Closing
  • B21C23/03 - by both direct and backward extrusion
  • B21K1/44 - bolts, studs, or the like
  • Y10T29/49664 - Ball making
  • Y10T29/49805 - Shaping by direct application of fluent pressure
  • Y10T29/49812 - Temporary protective coating, impregnation, or cast layer
  • Y10T29/49853 - of sphere, i.e., ball, in socket

• US Classifications

  • 029 - Metal working