2421648

Information

• Patent Grant
• 2421648

• References
• Source

• Patent Number

  2,421,648

• Date Filed

  Not available

• Date Issued

  Tuesday, June 3, 1947
  77 years ago

• CPC

  • C01F7/0613 - Pretreatment of the minerals

• US Classifications

  • 241 - Solid material comminution or disintegration