1991244

Information

• Patent Grant
• 1991244

• References
• Source

• Patent Number

  1,991,244

• Date Filed

  Not available

• Date Issued

  Tuesday, February 12, 1935
  89 years ago

• CPC

  • D21C7/00 - Digesters
  • D21C7/02 - Rotary digesters

• US Classifications

  • 162 - Paper making and fiber liberation