1742294

Information

• Patent Grant
• 1742294

• References
• Source

• Patent Number

  1,742,294

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1930
  95 years ago

• CPC

  • D21F1/74 - using cylinders

• US Classifications

  • 210 - Liquid purification or separation
  • 162 - Paper making and fiber liberation