1880044

Information

• Patent Grant
• 1880044

• References
• Source

• Patent Number

  1,880,044

• Date Filed

  Not available

• Date Issued

  Tuesday, September 27, 1932
  92 years ago

• CPC

  • D21C3/266 - the same pulping agent being used in all stages

• US Classifications

  • 162 - Paper making and fiber liberation