1810398

Information

• Patent Grant
• 1810398

• References
• Source

• Patent Number

  1,810,398

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1931
  93 years ago

• CPC

  • D21C3/266 - the same pulping agent being used in all stages
  • Y10S162/02 - Chip soaking

• US Classifications

  • 162 - Paper making and fiber liberation