1836243

Information

• Patent Grant
• 1836243

• References
• Source

• Patent Number

  1,836,243

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1931
  93 years ago

• CPC

  • D21F9/043 - with immersed cylinder
  • D21F3/086 - having a grooved surface

• US Classifications

  • 162 - Paper making and fiber liberation
  • 492 - Roll or roller